Ok, it's due to the subtype restriction hardcoded into CB GroupJive. There's nothing I can really do about this at this time as it might cause a conflict with GJ integration activity display parsing. You'd have to make a core modification for your usage to work. Specifically in the below file.
components/com_comprofiler/plugin/user/plug_cbgroupjive/library/Trigger/ActivityTrigger.php
At the top add 'notes' to $activitySubTypes. Added a feature to see if I can make this less restrictive to allow unknown types.
forge.joomlapolis.com/issues/8234