I was experiencing both the CSS issue as well as the validation error issue that other devs have mentioned. Your hotfix seems to have solved the CSS issue though!
To recreate the validation issue, login to that demo website again, then do the following (I’ve greatly simplified the field group for testing):
Go to Pages > Home, then “Add Flexible Panel”, select “Demo Panel”, then add dummy content in the “Content (1)” field (that one is required), then update the page. You’ll see “Validation failed. 3 fields require attention”. Those are hidden, conditional, required fields. To see them, switch “Number of Columns” from 1 to 4. You’ll see Content (2), Content (3), and Content (4), with the validation warning now visible.
