The Inline form error of a required, limited multiple file widget is rendered twice

Using Drupal 10.1
Enabling the file and inline_form_errors modules
I have created a block with a multiple-file field. Upon adding this new block and saving without adding a file the error displays as expected.

This should not be postponed as the latest comment says it can be reproduced in several core themes. Updated IS to reflect this.

I have been able to recreate the issue in 11.x

I would like to take this on.

I can confirm this is happening whether or not client side JS is running.

The reason we do not experience the issue in claro is because they have a workaround since before it was brought into Drupal core.

This is when the workaround was introduced: https://git.drupalcode.org/project/claro/-/commit/3bb63fdf6ecadd9a9ba87d...

The fix for this should also include removing that workaround code.

MR appears to have failures but also tagging for test coverage and issue summary update.

Thanks

Leaving as needs work because tests are requested but it appears as if the MR is passing so no current regressions detected. Let's get the test in!