ExstarHUB 1.0.8-4 BUG - sometimes unable to optimize global markers - workaround possible

in ExStarHub 1.0.8-4 i after scanning global markers I get the usual “please optimize global markers” request.

After pressing the optimize button as usual ExStarHub starts the optimisation process displaying optimisation progress but after finishing still prompts me to optimize global markers and does not allow for scanning pointcloud.
Repeatedly trying to optimize global markers yields the same result.

Issue is project group specific. Restarting ExStarHub and trying to continue work on affected project group(s) yields same error. Creating a new project group and rescanning global markers IN THE NEW project group lets me work around the error.

Please advise how to package up affected project groups for analysis and how to send them to you if you want/require project group data do analyze.