Hello,
Thanks for the feedback!
I just checked and the Advanced Validations fields look fine on my test install. See screenshot.
Your problem might come from custom CSS rules in the theme or in a plugin. I would recommend to switch to the native Twenty Twenty One theme see if that fixes the issue. If the problem persists, you can try to disable your plugins one-by-one (at the exception of ACF Pro + ACF Extended) until you find which one is causing this issue.
Hope it helps!
Have a nice day!
Regards.
I found the issue.
The ACF Frontend plugin creates the problem.
I post it to the developer to see if he fixes it.
https://ww.wp.xz.cn/support/topic/problem-with-advanced-custom-fields-extended/