Bug Editor CodeMirror / Community Builder

Hello,
I can't save a description when I use the CodeMirror editor with the Joomla 5 version.
I tested on a brand new version of Joomla 5.2.3 and the latest version of Community builder.
I thought I had an extension that conflicted with Community builder, but this is not the case when testing on a test version of Joomla and only with a downloaded Community builder extension.
For example, if I create a field, a list or a tab, the title is created, but the description disappears when I validate.
As soon as there is a description to add, it disappears when validating.
This only happens with the CodeMirror editor.
I never had a problem in Joomla 4, it seems to me. 

This only happens in CB? Joomla articles for example store fine?

Yes, only with Community builder.
I just created the first Joomla article on my test version, there is no problem.

Ok, thank you for letting us know. Will retest to see what's going on. Likely some sort of editor JavaScript initialization problem of some kind.

No problem.
If you find the solution, I would be relieved to see a fix.