Arastas map hard locks the game

The map Arastas in act 4 appears to have been broken in one of the recent patches such that it crashes my game with 100% repeatability. Specifically, in the beginning of the map as I walk up the stairs, the flags that are strung between the buildings on the street spawn in, causing the game to stutter and then, after 2-3 seconds, crash completely. I've tried every combination of settings i could think of (including changing between dx12 and vulkan), rebooted my PC several times and updated my drivers with none of these helping the issue. After ~15 minutes the instance resets and I can once again load into the game, but attempting to proceed into the map repeats the crash. I've also verified the game cache on steam.

It is additionally repeatable on other characters - if I take a character in the endgame and return to the act 4 map, it crashes the game in the same manner. I've additionally had some crashing issues on the endgame map that uses the same tile set(though I haven't investigated this as exhaustively)

I've not had this issue or any like it leveling 4-5 characters to the endgame between patch 0.3 and 0.4 since Act 4 was added. Nothing notable has changed on my PC in that time to cause this issue to arise.