When having grouped fields (tabs) and paragraphs enabled, the use of the class 'error' causes the functionality to automatically focus on this field when opening a paragraph. The reason is the class 'error'. This is why I propose to change the name from 'error' to 'exceeded'. This way, the functionality keeps working both when an AJAX request is called and when the data limit is exceeded, as it's used to render the color in CSS rather than actually focusing on the element itself during AJAX calls.
Add multiple fields to different field groups (tabs), also enable paragraphs or other AJAX fields in a different field tab than the maxlength field that is exceeded. Then trigger the AJAX functionality in a this tab and observe that the maxlength field gets the focus. After applying the patch, this behavior is no longer happening.
Make a MR based on the patch
Test if the functionality keeps working correctly
Active
2.1
Code
Had some discussion and found out the reason of this bug was because of the field_groups module, ill fix it there instead of here so the class 'error' can still exists, will close this issue for now (: