A bug I have ran into 3 times out of 3. First time I came to a ladder I had a flash light in hand. Once I got onto the ladder the flash light sort of attached it's self to the wall. I could not get it back after I got off the ladder.
Second time I tried climbing a ladder. Same thing happened only this time it took my battery and not the flash light. Third time I had a gun in hand a pistol. Found it on top of fire station roof in cherno. Got on ladder and climb down. Weapon was gone. Got back on ladder and back onto rood. The gun was on the floor by the top of the ladder. So I picked it up had it in hand. Got on ladder again got of ladder and again gun was gone. Looked on floor and it was no wear to be seen.