Map in off-hand doesn't update

I can confirm this issue. The odd part is, the default (lvl 0) map works properly even in offhand, even while the other sizes do not

It's not fixed in the newest snapshot.

I think these two images make it maybe a bit more clear. I screened this in 34a

I had this issue too, but i /kill myself and maps(they must not exist even as item on the ground)
now its working (reloging, new maps, new worlds wont help- strange) (Im on Minecraft 15w34b too lazy for other)

tested, but i cant guarantine its gonna bug out to anyone else, it has something to do with filling new maps.
reproduce*
try having one map in one chunk and another in other map chunk(all in hands full, WARNING you wont see it when the one in off-hand is in spawn chunks
Psst. try hanging oround with it more so the bug will work for every map in off-hand(when holding something in main, of course)
— Again it may not glith on some computers becouse they are going to detect change and priority of main will be the same, but it works to me every time