2 fplanque Aug 13, 2017 02:46

I think the problem is the warning. If you disable the warning for the actual collection, everything goes right.
@fede the same issue is also reported here: http://forums.b2evolution.net/scrollbar-missing-after-switching-from-markup-to-wysiwyg. We are already working on a fix.
Regards!
@fede a fix for this issue will be included in the next release of b2evolution.
Regards!
Can you try a different web browser?