what i expect to happen: items inside item frames to not vanish to nothing
what happen:randomly the item frame vanishs rather that turning in to a drop
1st get a few item frames then place one down and put one inside it
2nd and repeat
3rd randomly the item inside vanish
http://youtu.be/NGal3mY2Qyc
youtube video
give it a while it uploading
If I understand correctly, you are referring to this bug here: MC-1285, in which case this is a duplicate. Please check before posting.