I confirmed this issue on Lake Superior (Trammel south wall and Felucca east wall), Europa (Trammel south and east walls as well as Felucca south wall) and Atlantic (Trammel east and south walls).
I did not see any obvious reason why this would occur nor did I see any problems with the Cave Troll or palisade blockade on the level two Shame bridge. It looks to only be occurring with the stalagmite walls.
These walls were manually fixed and I have submitted a problem report into the system on this issue.
