Playerbots fall out of instances

[Jgoodwin64]

Describe the bug Caster playerbots use "move away" to get a clear shot for a spell. In Scarlet Monastery, and other instances, they can sometimes get pinned to a wall and then "move away," causing them to fall out of the map.

Commit hash 8816758

To Reproduce Steps to reproduce the behavior:

Enter Scarlet Monastery with caster playerbots or go in as a Warlock and turn on playerbot self.

Engage in combat where the playerbots need to reposition for casting. If a group of mobs attack and there is mass ciaos, it seems more likely to happen.

Observe bots moving away towards the walls. If they get cornered, they fall out of the map when readjusting.

Notice the bots get pinned and fall out of the map. Not too big a deal as they just fly back in, unless you are in playerbot self mode. Then you are stuck if you cant fly.

Expected behavior Playerbots should reposition without falling out of the map, even if pinned against walls. Especially for playerbot self mode as you can't always just fly back in.

Screenshots I can get some screenshots if needed as it is easy to reproduce. I'm using windows 10.

Additional context I know it is likely low priority, I just wanted to shine light on the issue.