i'll edit this post if i can get a consistent problem, since i have a few alts, and the weather / internet is sporadic here,
there seems to be a mesh issue in the level 3 horde garrison when coming out of the town hall, where it get's a bit stuck between subsystems, it can't nav from the rest spot near the small building / flight point on level 3 garrison on horde, to the mines.
moving manually, everything resumes and the bot can nav nearly everywhere except for the fishing shack without any hitches.
even the mines are doing fairly well at not backtracking up and down the stairs, although that one node at the foot of the stairs presents some backtracking problems.
It might be a temporary issue, so i'll wait till the weather clears up and the internet doesn't drop out every 2-4 minutes, as its seriously cramping the gather stuff when my DSL disconnects in the middle of fishing, or just getting stuck anywhere. however, when there's no NPC's to see doing the moonwalk/disconnect shuffle, it takes at least a minute for the game to realise the internet is not working properly. in the meanwhile, will delete the garrison mesh cache files and see if it clears up after that.