Every time we place paintings, and it's normal to place a lot of them before you actually get the one you wanted, if we keep at it for quite some time, the block behind it eventually breaks.  I've tested it quite a few times, although I have to say it seems like it has gotten better since previous releases I can still confirm it happens and it's just annoying. 

PS: I've searched  to find a similar issue in the Reports, but I found none. Thank you.
I also can´t provide visual proof, because I would need to record it, and I don't own recording software, sorry.