CHAOS CRASH ROOM 7 (elemental towers)

4 out of 5 times when I run chaos I get to room 7 and as mobs are spawn the game freezes. This seems to be consistent with me choosing the lightning or fire spamming towers on the edge of the map. I have literally turned off all my graphics settings to lowest to see if it helps and no... same issue. I run an Nvidia 4090 with a core I9