i had the same issue. So far I think it's EQL3 (extended quest log). I was able to stop crashing after disabling EQL3. I re-enabled it and unchecked everything in the "tracker options" except "Add new quests to tracker" (only reason I use this addon) and "Add untracked quests on progress".
So far I haven't crashed yet (knock on wood)
Here's a list of my addons so you have something to go by.
Atlas
AtlasLoot Enhanced
AtlasQuest
Auctioneer
Chronometer
EnhTooltip
Extended Quest Log 3.6.1
Improved Error Frame
Luna Unit Frames
maff (move anything frame finder)
MobHealth3
MoveAnything!
OmniCC
Sell Value
SpamThrottle
Stubby
Questie v3.69
I hope this helps!
