I was actually watching the screen when this crash happened and it looks to me like it might have been caused by 4-6 nodes in very close proximity. The bot went a bit crazy spinning around its own axis with some jerky movements back and forth and then wow crashed. I have the crashdump from wow as well but I am not posting that in a public forum, if a dev wants to have a look at it I can send it privately.
I had a look around the area where the bot crashed and its 3 reef plates on top of each other, all with herbs and ores, so I would expect pathing to be a serious issue in the particular spot.
It happened again and when I logged on the bot was underneath a reef plate in vashjir with a node above.
it happens to me from the moment i start botting with HB (for 3-4 day already). THe same issue - Fatal exception, but i do pvp only... and arelogger doesnt work...