Pathing: U-turn with doors in one arm seems to confuse nobles

Building another castle, and realized that no building is done anymore. Reason is that my builders want to build wood floors, but always abort the path to it after opening one of three dors (no error message anywhere of path failed or anything). See picture. Nobles in question in the savegame are Snacks and Tary. Tearing down the first two doors cleared the pathing.

The Chalk Blokes.Save 24.octsav.gz