Bug after a possession turn

[Emeric]

In game #6022 Turn 12.
After I played a possession, my opponent (Lord Rattington) play is turn correctly and just after at the star of my turn where I had a dungeon to resolve, the message said "Waiting for Lord Rattington" and I can't do anything.
I have to resign.

Emeric

[yed]

Workareound is to type:
/undo 1