Freeze in Ecologist mission

Anomaly v1.5.1 Ecologist completed research and came back to me, however no sound was played and no task change appeared. My game froze shortly after that - I could hear sounds but everything else was frozen, so I only could Alt+F4 it.

Apparently, this has been known as "jup_b6_stalker_1_measurements_done" having actor as sound type (however I do not understand what that is).