BUG/PROBLEM REPORT (OR OTHER COMMON ISSUE)

This is a default Plone Site, no addons or configuration changes. Migrated from 5.2.10 to 6.0.6. I do not have any issues with a site that is created in this environment in 6, it's only ones migrated from 5. As far as I can tell, the resource registry and theme css are exactly the same.

What I did:

Create a Plone Site in 5, make no changes. Copy the DB to a Plone 6 environment. The 5 environment was built with buildout and the 6 is built with just venv/pip.

What I expect to happen:

appropriate svg images for Selected and Rearrange buttons

What actually happened:

No svg images included so it uses the fallback Plone icon. This also increases the size of the button.

What version of Plone/ Addons I am using:

Migrated 5.2.10 to 6.0.6, no addons