Simulacrum bug

I beat floor 14 but the delirium encounter ended up getting stuck at 4 so I ran around for 3 minutes throwing fireballs with no luck so I left and came back to see it that would fix it.. NOPE I came back and found strangely Familiar entity chilling there asking for me to start wave 14 again but it does let me click start along with the encounter at 4 still being active on the side