It’s more likely when the load time between areas is short. Like if you do go back and forth then speed over to another door it can crash.
If you are teleporting only forward as fast a possible I’ve got it to crash but couldn’t replicate it.
If you are a paladin running at lightning speed you may crash it moving forward. Just like the Sorc did.
There could be a bug in loading textures that happens very rarely in “normal” play moving slow. But happens quite often when you are zipping around the tower.
So far it’s only when I “shake the baby” bad stuff starts to happen with frequency. Trying to make it fail.
There’s also the possibility of it being less of a problem when your system has a solid state drive and high bandwidth (+ fast) memory.
What can people do? 
- Stay out of the Tower of Catastrophy. (Crying may now commence).
- Move Slower, don’t back track.
- Ignore any practical advice and do what everyone else does. Complain until the illusion of it delivering results comes to pass.
Just what I have been messing with. Take it where ever you choose. Satisfied my own curiosity and I can run tower just fine… so
Bur-bye 