Template of progressbar uses from Stable theme during csv/xls export

Can you elaborate on why this is an issue!

Because on Drupal 9.4.* progressbar uses from Seven administration theme and after update to Drupal 9.5.* it uses from Stable theme.
Do you think it was planned changes in Core?

The seven theme has been moved to contrib.

It doesn't extend from stable https://git.drupalcode.org/project/seven/-/blob/1.0.x/seven.info.yml#L3

So I'm guessing you're now seeing the front-end theme instead of the admin theme?

Can you check if the user has 'use the administration theme' permission

I have checked on Drupal 9.4.12 and saw that template uses from Seven theme for progressbar, but after upgrade to Drupal 9.5.9 it uses template for progressbar from Stable theme. You can see on my attached screenshots with enabled twig debug.

Besides, I have checked it on Adminimal child (administration theme) and have the same result.

And the permission?

I didn't find permission with name "use the administration theme".

This issue is reported on Drupal 9.5 and the Seven theme. Drupal 9 is now out of date and Seven has been removed from core. Therefor, the best thing to do seems to be to move this to the Seven theme.