When you look away from an Item frame that has a map in it (not fully away, keep the frame in the corner of the screen) the frame and map disappear. Looking at the frame again causes it to reappear.
When you look away from an Item frame that has a map in it (not fully away, keep the frame in the corner of the screen) the frame and map disappear. Looking at the frame again causes it to reappear.
Ethan John Heims
(Unassigned)
Unconfirmed
Minecraft 1.7.2
Retrieved
I can confirm this running OpenJDK on Ubuntu 14.04.
I assume the (smaller) hitbox of the Item fram is used when determining whether to display it or not. This causes a problem, because the map (which is a child of the item frame) is larger than the containing frame.