M2.4.1 Page builder doesn’t save edited content for CMS pages

After editing content on some CMS pages via Page Builder edited content submits without any changes in payload:

Looks like problem also related to all places where Page Builder is involved (category, product description etc).
If Page Builder is disabled, via WYSIWYG and TinyMCE4 content changes without any problems.
PageBuilder version 1.5.0