For the past few days, and primarily in repeatable locations such as finishing riding training with the stablemaster in Rawl'kha and the Provisioning writ turn in box in Rawl'kha, the game has been freezing. It then hangs for about 10 minutes before it crashes to desktop without an error reporting box.

Then every time I try to log in that same character (this has happened on numerous characters now too) over the course of numerous hours the game hangs after selecting the character, can sit stuck for at least 30 minutes (that's the longest I left it before manually crashing out), never recovers, and upon logging back in to character select the previous character is in fact pre-selected (not the one that hung and failed).

This has happened not only to myself, but to my partner @Kaibeth as well, although her case of it was with the stable-trainer in Rimmen.

It seems that the quest reset time is the earliest one can log back into these characters successfully, i.e. 10pm Pacific time (as I said, I've tried every few hours after throughout the day/night).