This issue has reappeared on Drupal 10.x.
It occurs when clicking the setting...

This issue has reappeared on Drupal 10.x.
It occurs when clicking the settings icon in "Manage Form Display" when all of the following conditions are satisfied:
1. The office hours field is used in a paragraph
2. There are other fields in the same paragraph (e.g. a Text (Plain) field)
3. Widget type is either "Office hours (week) with exceptions and seasons" or "Office hours (week)"

NOTE:
If office hours field is the only field used in the paragraph then there is no issue.
Add a second field to the paragraph and the issue will show.