Maze backtracking glitch

[CuAnnan]

When returning to the exit, after exposing the map fully, the party will sometimes skip a cell. I suspect this is something to do with how the backtrack queues are populated and emptied.

[Wazaq]

Observed this one, it looks like it skips when it get's adjacent to the exit. When the party was going back and was diagonal to the exit space, instead of going down then left, it went diagonal, down/left