I maybe found another bug in version 2.3.3.
I'll send you a test DB via support ticket.
Try the following query in explorer:
SELECT u FROM Unit u WHERE :user MEMBER OF u.users
Set user to TrackerUser#8
If i run this quey i get:
Invalid operand type at.co.pjm.tracker.persistence.TrackerUser for operator MEMBER OF SELECT u FROM Unit u WHERE :user MEMBER OF u. ==> users <==
In my opinion the result should be Unit#4004
Thanks for your help.