Got stuck after defeating Mektul

I just beat Mektul last second, at the end of tunnel surrounded by lava. He dies and drop green quest item, i pick it up on "item on hand" animation while my inventory is open, but i can't put the item in inventory because is full, and i can't drop it. Plus, im stuck in terrain, i can't move and i can't take portal, basically i'm unable to do any action in game, i tried to quit and reenteer but i came back to the same state.