After mutiple attempt Pandas apply with swifter does not execute NLP function passed. #225

I am a new user here. today to fast process my NLP preprocessing, I have used swifter with apply, so initially it worked as expected, and, I observed a little bit of speed improvement. On the contrary, because model accuracy was low, so i attempted this multiple time, than at sudden it became very quick, in progress bar i could see the speed , but on completion the input text returned in output, without any processing, it was very strange issue to me, tried restarting kernel, reloading data, and checked my code twice, but nothing worked. Finally, i executed pandas apply without swifter, and code executed successfully. I wondered when, i ran again apply+swifter ,it started working normally and data proceeded through code. this time swifter took longer time as before it was consuming.
Any suggestion on above issue. thanks