Bot deletion bug

[jameshallam93]

Summary:

Bot was deleted after it tried to move to a square which was already occupied by a different bot.

I believe this is the problematic code, based on the fact that the bot is not re-added to the location overlay after being removed if there is a problem moving the bot to the new tile (as in the case of another bot being present in that tile).

More context

logdump.txt

[Yawrf]

Can verify, with clarification that it seems to only be when they both move into a tile at the same time - one being in a square prevents others from moving into the square, but they can move into a square simultaneously and one of them gets deleted then