Same problem here.
Running php 7.4
Thanks for the quick reply.
I meanwhile got in contact with the acf support. They could reproduce the issue and will fix it. So probably it is an acf problem with the classic editor i think….
Just for anyone else facing this problem:
I am using the current WP Version with current ACF Version.
The problem is about the classic wysiwyg editor in a custom acf block with other custom fields.
Sorry for the inconvenience…
