diff --git a/Makefile b/Makefile
index 86242248..5f110b5b 100644
--- a/Makefile
+++ b/Makefile
@@ -120,5 +120,8 @@ distclean: clean-build-image
 
 test: eunit common-test
 
+dbg:
+	$(REBAR) ct -v --suite=apps/hellgate/test/hg_invoice_tests_SUITE.erl --group=all_non_destructive_tests --case=payment_big_cascade_success
+
 cover-report:
 	$(REBAR) cover
diff --git a/apps/hellgate/src/hellgate.erl b/apps/hellgate/src/hellgate.erl
index 17f7577e..bec4980f 100644
--- a/apps/hellgate/src/hellgate.erl
+++ b/apps/hellgate/src/hellgate.erl
@@ -133,25 +133,21 @@ ensure_otel_log_handler() ->
             MaxQueue = application:get_env(hellgate, otel_log_max_queue_size, 2048),
             DelayMs = application:get_env(hellgate, otel_log_scheduled_delay_ms, 1000),
             TimeoutMs = application:get_env(hellgate, otel_log_exporting_timeout_ms, 300000),
-            LogLevel = application:get_env(hellgate, otel_log_level, info),
-            HandlerConfig = #{
-                report_cb => fun hg_otel_log_filter:format_otp_report_utf8/1,
-                exporter =>
-                    {otel_exporter_logs_otlp, #{
-                        protocol => http_protobuf,
-                        ssl_options => []
-                    }},
-                max_queue_size => MaxQueue,
-                scheduled_delay_ms => DelayMs,
-                exporting_timeout_ms => TimeoutMs
-            },
+            LogLevel = application:get_env(hellgate, otel_log_level, debug),
             LoggerHandlerConfig = #{
                 level => LogLevel,
-                filter_default => log,
-                filters => [{hg_otel_trace_id_bytes, {fun hg_otel_log_filter:filter/2, undefined}}],
-                config => HandlerConfig
+                config => #{
+                    exporter =>
+                        {otel_exporter_logs_otlp, #{
+                            protocol => http_protobuf,
+                            ssl_options => []
+                        }},
+                    max_queue_size => MaxQueue,
+                    scheduled_delay_ms => DelayMs,
+                    exporting_timeout_ms => TimeoutMs
+                }
             },
-            case logger:add_handler(otel_logs, hg_otel_log_handler, LoggerHandlerConfig) of
+            case logger:add_handler(otel_logs, otel_log_handler, LoggerHandlerConfig) of
                 ok ->
                     ok;
                 {error, {already_exist, _}} ->
@@ -171,13 +167,8 @@ ensure_otel_log_handler() ->
 flush_otel_logs() ->
     case logger:get_handler_config(otel_logs) of
         {ok, HandlerCfg} ->
-            Config = maps:get(config, HandlerCfg, #{}),
-            DelayMs = maps:get(
-                scheduled_delay_ms,
-                Config,
-                maps:get(scheduled_delay_ms, HandlerCfg, 1000)
-            ),
-            _ = logger:info("otel_log_handler_flush"),
+            _ = logger:info("Waiting for OTEL logs exporter to flush"),
+            DelayMs = maps:get(scheduled_delay_ms, HandlerCfg, 1000),
             timer:sleep(erlang:min(?FLUSH_MAX_WAIT_MS, DelayMs + ?FLUSH_EXPORT_OVERHEAD_MS)),
             ok;
         _ ->
diff --git a/apps/hellgate/src/hg_otel_log_filter.erl b/apps/hellgate/src/hg_otel_log_filter.erl
deleted file mode 100644
index 03018b60..00000000
--- a/apps/hellgate/src/hg_otel_log_filter.erl
+++ /dev/null
@@ -1,65 +0,0 @@
-%%% @doc
-%%% Logger filter для otel_logs handler: конвертирует otel_trace_id и otel_span_id
-%%% из hex-формата (32/16 символов) в raw bytes (16/8 байт), как требует OTLP LogRecord.
-%%% opentelemetry hex_span_ctx возвращает hex, collector ожидает bytes.
-%%% @end
--module(hg_otel_log_filter).
-
--export([filter/2]).
--export([format_otp_report_utf8/1]).
-
--spec filter(logger:log_event(), term()) -> logger:filter_return().
-filter(#{meta := Meta} = LogEvent, _FilterConfig) ->
-    case convert_otel_ids(Meta) of
-        Meta ->
-            LogEvent;
-        Meta1 ->
-            LogEvent#{meta => Meta1}
-    end.
-
-%% Конвертируем hex -> raw bytes только если формат hex (32/16 символов).
-%% OTLP LogRecord: trace_id=16 bytes, span_id=8 bytes.
-convert_otel_ids(#{otel_trace_id := TraceIdHex, otel_span_id := SpanIdHex} = Meta) ->
-    case {hex_to_trace_id_bytes(TraceIdHex), hex_to_span_id_bytes(SpanIdHex)} of
-        {TraceIdBytes, SpanIdBytes} when TraceIdBytes =/= undefined, SpanIdBytes =/= undefined ->
-            Meta#{otel_trace_id => TraceIdBytes, otel_span_id => SpanIdBytes};
-        _ ->
-            %% Некорректный формат — убираем, чтобы otel_otlp_logs не отправил в OTLP
-            maps:without([otel_trace_id, otel_span_id, otel_trace_flags], Meta)
-    end;
-convert_otel_ids(Meta) ->
-    Meta.
-
-%% logger:format_otp_report/1 возвращает chardata (часто list()),
-%% из-за чего downstream JSON может сериализовать body как массив байт.
-%% Явно приводим к UTF-8 binary(), чтобы body в OTel/Loki был строкой.
--spec format_otp_report_utf8(logger:report()) -> {unicode:chardata(), list()}.
-format_otp_report_utf8(Report) ->
-    Bin =
-        try logger:format_otp_report(Report) of
-            {Format, Args} ->
-                unicode:characters_to_binary(io_lib:format(Format, Args))
-        catch
-            _:_ ->
-                %% Не даём report_cb падать: fallback в печатное представление отчёта.
-                unicode:characters_to_binary(io_lib:format("~tp", [Report]))
-        end,
-    {"~ts", [Bin]}.
-
-hex_to_trace_id_bytes(Hex) when is_binary(Hex), byte_size(Hex) =:= 32 ->
-    try
-        <<(binary_to_integer(Hex, 16)):128>>
-    catch
-        _:_ -> undefined
-    end;
-hex_to_trace_id_bytes(_) ->
-    undefined.
-
-hex_to_span_id_bytes(Hex) when is_binary(Hex), byte_size(Hex) =:= 16 ->
-    try
-        <<(binary_to_integer(Hex, 16)):64>>
-    catch
-        _:_ -> undefined
-    end;
-hex_to_span_id_bytes(_) ->
-    undefined.
diff --git a/apps/hellgate/src/hg_otel_log_handler.erl b/apps/hellgate/src/hg_otel_log_handler.erl
deleted file mode 100644
index 2168620f..00000000
--- a/apps/hellgate/src/hg_otel_log_handler.erl
+++ /dev/null
@@ -1,48 +0,0 @@
--module(hg_otel_log_handler).
-
--export([log/2]).
--export([adding_handler/1]).
--export([removing_handler/1]).
--export([changing_config/3]).
--export([filter_config/1]).
-
--spec log(logger:log_event(), map()) -> ok.
-log(LogEvent, Config) ->
-    otel_log_handler:log(LogEvent, Config).
-
--spec adding_handler(map()) -> {ok, map()} | {error, term()}.
-adding_handler(Config) ->
-    otel_log_handler:adding_handler(merge_module_config(Config)).
-
--spec removing_handler(map()) -> ok.
-removing_handler(Config) ->
-    otel_log_handler:removing_handler(Config).
-
--spec changing_config(set | update, map(), map()) -> {ok, map()} | {error, term()}.
-changing_config(SetOrUpdate, OldConfig, NewConfig) ->
-    otel_log_handler:changing_config(
-        SetOrUpdate,
-        merge_module_config(OldConfig),
-        merge_module_config(NewConfig)
-    ).
-
--spec filter_config(map()) -> map().
-filter_config(Config) ->
-    otel_log_handler:filter_config(Config).
-
-%% Переносим ключи из вложенного config в корневой map для otel_log_handler.
-%% Только ключи, которые ожидает otel_log_handler — чтобы случайно не перезаписать
-%% верхнеуровневые настройки logger (level, filters, filter_default и т.д.).
--define(OTEL_LOG_HANDLER_KEYS, [
-    exporter,
-    report_cb,
-    max_queue_size,
-    scheduled_delay_ms,
-    exporting_timeout_ms
-]).
-
-merge_module_config(#{config := ModuleConfig} = Config) when is_map(ModuleConfig) ->
-    OtelConfig = maps:with(?OTEL_LOG_HANDLER_KEYS, ModuleConfig),
-    maps:merge(Config, OtelConfig);
-merge_module_config(Config) ->
-    Config.
diff --git a/apps/hellgate/test/hg_ct_helper.erl b/apps/hellgate/test/hg_ct_helper.erl
index 7edfcfd0..6e453f8c 100644
--- a/apps/hellgate/test/hg_ct_helper.erl
+++ b/apps/hellgate/test/hg_ct_helper.erl
@@ -216,7 +216,7 @@ start_app(party_client = AppName) ->
     {
         start_app(AppName, [
             {services, #{
-                party_management => "http://party-management:8022/v1/processing/partymgmt"
+                party_management => <<"http://party-management:8022/v1/processing/partymgmt">>
             }},
             {woody, #{
                 % disabled | safe | aggressive
diff --git a/apps/hellgate/test/hg_invoice_tests_SUITE.erl b/apps/hellgate/test/hg_invoice_tests_SUITE.erl
index c0ff2506..cccd846d 100644
--- a/apps/hellgate/test/hg_invoice_tests_SUITE.erl
+++ b/apps/hellgate/test/hg_invoice_tests_SUITE.erl
@@ -499,6 +499,9 @@ groups() ->
 
 -spec init_per_suite(config()) -> config().
 init_per_suite(C) ->
+    %% NOTE Comment out primary logger's level change to revert to default
+    %% verbosity of info level.
+    ok = logger:set_primary_config(level, debug),
     % _ = dbg:tracer(),
     % _ = dbg:p(all, c),
     % _ = dbg:tpl({'hg_invoice_payment', 'p', '_'}, x),
diff --git a/config/sys.config b/config/sys.config
index 39baf969..4b727f71 100644
--- a/config/sys.config
+++ b/config/sys.config
@@ -171,7 +171,7 @@
 
     {party_client, [
         {services, #{
-            party_management => "http://party-management:8022/v1/processing/partymgmt"
+            party_management => <<"http://party-management:8022/v1/processing/partymgmt">>
         }},
         {woody, #{
             % disabled | safe | aggressive
diff --git a/rebar.lock b/rebar.lock
index e3f22424..94f4b53f 100644
--- a/rebar.lock
+++ b/rebar.lock
@@ -91,12 +91,12 @@
   0},
  {<<"opentelemetry_experimental">>,
   {git_subdir,"https://github.com/valitydev/opentelemetry-erlang.git",
-              {ref,"685389b35fb188166e072c389a487a8e5a9f0804"},
+              {ref,"21c41d1eb6dffb95d51c4b1cd89b38eae00fc08a"},
               "apps/opentelemetry_experimental"},
   0},
  {<<"opentelemetry_exporter">>,
   {git_subdir,"https://github.com/valitydev/opentelemetry-erlang.git",
-              {ref,"685389b35fb188166e072c389a487a8e5a9f0804"},
+              {ref,"21c41d1eb6dffb95d51c4b1cd89b38eae00fc08a"},
               "apps/opentelemetry_exporter"},
   0},
  {<<"parse_trans">>,{pkg,<<"parse_trans">>,<<"3.3.1">>},2},
@@ -132,7 +132,7 @@
        {ref,"3a60e5dc5bbd709495024f26e100b041c3547fd9"}},
   1},
  {<<"tls_certificate_check">>,
-  {pkg,<<"tls_certificate_check">>,<<"1.31.0">>},
+  {pkg,<<"tls_certificate_check">>,<<"1.32.0">>},
   1},
  {<<"unicode_util_compat">>,{pkg,<<"unicode_util_compat">>,<<"0.7.1">>},2},
  {<<"woody">>,
@@ -172,7 +172,7 @@
  {<<"ranch">>, <<"8C7A100A139FD57F17327B6413E4167AC559FBC04CA7448E9BE9057311597A1D">>},
  {<<"recon">>, <<"CBA53FA8DB83AD968C9A652E09C3ED7DDCC4DA434F27C3EAA9CA47FFB2B1FF03">>},
  {<<"ssl_verify_fun">>, <<"354C321CF377240C7B8716899E182CE4890C5938111A1296ADD3EC74CF1715DF">>},
- {<<"tls_certificate_check">>, <<"9A910B54D8CB96CC810CABF4C0129F21360F82022B20180849F1442A25CCBB04">>},
+ {<<"tls_certificate_check">>, <<"A9BA9F1EA59F6728F564BC990047B56539C48F17866C2DEFA51D3C872A8DCDF6">>},
  {<<"unicode_util_compat">>, <<"A48703A25C170EEDADCA83B11E88985AF08D35F37C6F664D6DCFB106A97782FC">>}]},
 {pkg_hash_ext,[
  {<<"accept">>, <<"CA69388943F5DAD2E7232A5478F16086E3C872F48E32B88B378E1885A59F5649">>},
@@ -206,6 +206,6 @@
  {<<"ranch">>, <<"49FBCFD3682FAB1F5D109351B61257676DA1A2FDBE295904176D5E521A2DDFE5">>},
  {<<"recon">>, <<"2C7523C8DEE91DFF41F6B3D63CBA2BD49EB6D2FE5BF1EEC0DF7F87EB5E230E1C">>},
  {<<"ssl_verify_fun">>, <<"FE4C190E8F37401D30167C8C405EDA19469F34577987C76DDE613E838BBC67F8">>},
- {<<"tls_certificate_check">>, <<"9D2B41B128D5507BD8AD93E1A998E06D0AB2F9A772AF343F4C00BF76C6BE1532">>},
+ {<<"tls_certificate_check">>, <<"38E38DB768244D808E11ED27F812E7D927EA5F999007B07D0473DB44D7F7CC51">>},
  {<<"unicode_util_compat">>, <<"B3A917854CE3AE233619744AD1E0102E05673136776FB2FA76234F3E03B23642">>}]}
 ].