GO2 randomly forgets that it can go from FWI to Landing

[dex]

So GO2 often randomly decides that it can't go from GC to Landing, for whatever reason:

--- Lich: go2 active.
[go2: error: failed to find a path between your current room (3668) and destination room (228)]
--- Lich: go2 has exited.

What I have to do to fix this is turn the arrowhead (trinket) manually, then do a go2 from landing back to GC, and then it'll starting working again, in both directions.... for a while, until it once again forgets that it can do that.

BTW, forcing the --fwi-trinket=arrowhead every time I try to use go2 doesn't help either. Once it gives that "failed to find a path" message there's no way to fix it other than manually turning the trinket and then using go2 to travel in the opposite direction first (to fwi). That seems to reset whatever is wrong with, and it functions fine for a while after that.

Any ideas?