I reported this before and it still hasn't changed, when i place a painting it is invisible in every world even with the modern texture pack. It was fine until the mini update
Linked issues
Comments 2
As mentioned in your previous ticket, this bug is being tracked at MCPE-121718. This bug is fixed in 1.16.230.54 Beta, and the fix will be included in the next full release. No specific date can be given.
I'm getting the same thing on PS4. I'm using City texture pack so I loaded back up I classic and its doing the same thing still. So frustrating. I hope they fix this!