Complete mess- Spawn together, endgame start, survivors in wall

Becko44

So i start the game normaly, lobby all normal.

Spawn at Macmillan estate together with survivors at one spot. i down 1 person hook him. Someone is opening a chest in the air. Survivor gets unhooked, all survivors get downed, endgame starts, 2 survs die right away to endgame, 2 ppl are unable to be picked up, endagme start sound plays over and over again, crows spawn at 2 remaining survs, edgame claws dont despawn, have to wait until they bleed out.

No idea what happened or what triggered it