I thought you might be interested in looking at [BUG] Callsign Attribute (GroupID) attribute isn't set on clients.
https://forums.bohemia.net/forums/topic/189080-bug-callsign-attribute-groupid-attribute-isnt-set-on-clients/?do=findComment&comment=2995583
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.