Also in 19w40a itemframe hitboxes (F3+B) are displayed incorrectly (offset), but that's another unrelated bug.
Also present in Minecraft 1.14.1 Pre-Release 1, but I can't add that version for some reason.
This bug is still present in Minecraft 19w12b (latest snapshot at the moment. Also, it's present in latest stable release 1.13.2, too).
Video evidence: Itemframe Map Wrong Hitbox - Minecraft 19w12b (video is larger than 10MB, therefore linked instead of attached)
Steps to reproduce:
1) Give yourself an Item Frame, Map (make sure it's a filled Map. You can make a filled map by right-clicking on Empty Map)
2) Place Item Frame on the wall. Place Map into item Frame.
3) Try to interact in any way with map-filled Item Frame while aiming at corners or edges.
4) Any interaction will fail. You will interact with block behind item frame instead.
Please reopen and confirm.
Should I change the title to reflect the fact that it also affects Glow Item Frames or description is enough?