Big paintings wall requirement is offset

Existing 4*4 and 4*3 paintings have a wall space requirement that is offset from the visual appearance of the painting as shown is attached screenshots. Paintings from an older version of the game (updated from 1.6.4) disappear/pop off if this requirement isn't met and new ones cannot be placed. If the blocks are removed the painting pops off too.

Tested in singleplayer 1.8.9 and multiplayer 1.8.8 (running spigot with dynmap as only plugin) with same results.

I personally have problems with this in my gallery where all in game paintings are on exhibition and doors now have to be closed for these paintings to exist 😞 . I want my gallery complete and visually and spatially appealing.

Sorry if this is a duplicated report. I've searched but haven't been able to find a similar one.