CAF portlet - problem with HTML Input (WYSIWYG HTML Editor)

Hello,

After migration 8.2 to 9.6, HTML Input (WYSIWYG HTML Editor) does not work correctly in the CAF portlet.
I am changing and saves input content. After page reload, input has old content (before change).
Before migration, portlet worked fine.

MWS version: 9.6.0.0.96
Installed Fixes: OPT_9.6_Fix2

Do you have any idea?
Thx,
JL