A copper golem between two rows of double chests (5 above, 5 below) gives up and forgets before it has visited all ten of them. In the screenshot, the golem is holding an item that belongs in chest #7. It made 42 attempts before finally finding the correct chest. It seems to give up consistently after visiting chest #4 and sometimes #2.
8 6 1 2 9 3 4 (pause)
6 1 2 9 4 (pause)
8 6 1 2 9 3 4 (pause)
6 1 2 9 3 4 (pause)
8 9 6 1 2 (pause)
8 9 6 1 2 (pause)
6 1 2 9 3 4 (pause)
8 7 (success)
you need to have video proof so they will know how to fix it