Affects Version/s: Minecraft 1.8.3, Minecraft 1.8.4, Minecraft 1.8.5, Minecraft 1.8.6, Minecraft 15w34d, Minecraft 1.10.2, Minecraft 16w42a, Minecraft 1.12.2
Fix Version/s: None
Windows 7 Home Premium
Java Version 8 Update 45 (1.8.0_45-b14)
Windows 10 Home
Java Version 8 Update 101 (1.8.0_101-b13)
Sometimes, paintings will be displayed offset by about 1 block and therefore seem to float in mid-air, though their hitboxes are still in place (attachments 1, 2, 4, 6 & 9). Other times, the whole entity (along with it's hitbox) will move 1 block up (attachments 3 & 7).
The original painting positions can be seen in attachments 5 and 8.
Works facing all directions.
NOTE: The world I originally saw this in was uncommonly redstone-heavy and I was unable to recreate the bug in another world.
Tested in Minecraft versions 1.8.3, 1.8.4, 1.8.5 and 1.8.6.
Sorry if this is a duplicate, i looked through all issues with the word "painting" in their name and didn't find anything similar.