Some Endgame Maps Crash on Load

I've tried searching through the difference posts about maps crashing, but none seem to be the same as the issue my partner and I are having.

We just completed our first run through the campaign and were trying to do our first maps through the map device. We initially tried Scriptorium, but both of us crashed back to the login screen as soon as entering the portal to the map. The same thing happened when we tried Bone Crypt. However we were able to load into Gardens and Siege.

Many of the posts indicated this is a graphics issue ... but we lowered our graphics resolution to the lowest level and the maps still crashed. We were able to get into Gardens and Siege with our normal graphics settings, and we have not had this trouble during the campaign.

I'm using an Nvidia GeForce RTX 4060 graphics card ... my partners is about the same generation, but a different brand laptop. My card has 8GB of memory, and neither the GPU or graphics memory seem to be overtasked while playing.

Are there specific graphics settings we should check to try to get into the end game maps that crash on entering the map? Or is there a different issue that would impact specific maps like that?