Ok, so your issue has nothing to do with content plugins, but editors-xtd plugins. Those are 2 completely different usages. Those are turned off in GJ Events and many other usages. You can force them back on in the below file.
IN: components/com_comprofiler/plugin/user/plug_cbgroupjive/plugins/cbgroupjiveevents/component.cbgroupjiveevents.php
ON: Line 269
FROM:
Code:
$event = $_CB_framework->displayCmsEditor( 'event', $this->input( 'post/event', $row->get( 'event' ), GetterInterface::HTML ), '100%', null, 40, 10, false );
TO:
Code:
$event = $_CB_framework->displayCmsEditor( 'event', $this->input( 'post/event', $row->get( 'event' ), GetterInterface::HTML ), '100%', null, 40, 10 );
This likely won't be changed for a later release. Default Joomla would output module inserting, page break, read more, etc.. in GJ Events which would make no sense. I believe using JCE you can output those without needing GJ Events to do it itself.
Edit: Have changed for next nightly to output editors-xtd plugins.