When Edit content, then "row" class removed

I confirm the problem.
I did a standard installation of Drupal 10.3.0, configured the plugin in the visual editor and disabled all HTML restrictions.
For me the classes that are being removed are "bs_grid" and "row".
I verified that the field is being saved in the database with the expected HTML.
I don't understand much about plugins for CKEditor, but it seems to me that the problem is with the HTML loading by JS.

Same problem as above.

Moreover, switching between "Source view" and "WYSIWYG view" mode drops both 'bs_grid' and 'row' classes if you modify a bit the 'source' (e.g: adding one letter in a P paragraph) before switching back to "WYSIWYG view" mode.

Is this possibly related to 🐛 Cannot have div tags inside columns in CKEditor 5 Active ?

This appeared to be something different. Can you try the MR ?

It changes order in class, but it still "row" and "bs_grid"
+1 RTBC MR !22

MR !22 solved the problem.
Thanks @b_sharpe.

Thanks! committed.

Automatically closed - issue fixed for 2 weeks with no activity.