Pretty sure that's the Ruffeviertel Wells map... In one of the corner of the map, there's a 3-floors building, atop which there's often a Shard or Treasure. There are 3 ways to get to the 2nd floor : a ramp, a ladder from inside the destroyed part and, if you have Rope & Hook, there's also a wall that can be escalated. This is where the identified bug is. It's all well known that standing above a ladder or wall prevents one from climbing it (great trick for ranged unit, that can be totally safe from melee warriors). The bug is, my opponent only had ONE unit left, standing on the THIRD floor, but directly above the square that would block me from escalating the wall to the SECOND floor. Normally, my Skavens (6/6 Movement), can climb straight to the THIRD floor from the GROUND floor by that way. I tried that, but I was forced to go around by the ramp (the long way, that can't get me to the 3rd floor in one round). So, the way I see it, standing on a different floor, but on the square just above the one that would block a ladder has the effect of effectively blocking it (as if the unit is standing on the square directly under it). I noticed that bug too on the Troutviertel Smithy map (I think). Again, in one corner of the map, there's a 3-floor building, with the 3rd floor just above a wall that can be climbed with a Rope (from ground to 2nd floor). I had my Skaven completely blocked from going that way by a Warlock standing on the right spot, but on the wrong floor (third). I thought then that it was because of a very well hidden unit, but I couldn't find it in the following turns (going around the long way). I now understand that it was the exact same bug, but on a different map. Please, Developers, put that on your to-do list. Thanks!