According to this:
http://www.reddit.com/r/dayz/comments/1y2fh3/bug_punching_people_in_the_face_fixes_their/
Punching damage fixes helmets. Since I believe I took zombie hits between the helmet being damaged, and noticing the "pristine" status, I think that's what triggers the bug.
Probably related if not exactly the same as #7958
Still happening in 114926.
Confirming this just happened to me on experimental. Painted M4, all attachments dissapeared. I did have a full inventory at the time.
http://forums.dayzgame.com/index.php?/topic/171265-changelog-stable-branch-033114926/
Near the bottom, but before the hotfix section.
New patch notes claim this is fixed.
This is also the same as #7437 #7383 and #7328.
From the forums, link to a video showing the issue with a backpack:
http://www.youtube.com/watch?feature=player_detailpage&v=g6rHlln-ab8#t=49
Notice how the contents of both "copies" update at the same time.
First, many thanks to Accolyte for the hard work of looking over the tracker. It was direly needed and I realize it's a thankless job.
However, I think there has been a mistake: A lot of bug reports have been closed as duplicate of this one, which is wrong (#7927 #7950 #7828 etc).
The current build has an issue where the "stuffed" status never dissapears, even after you are no longer stuffed. This has been acknowledged by rocket (https://twitter.com/Rocket2guns/statuses/431219001172455424). That's a bug.
This report relates to the apparently conflicting messages of being both stuffed and starving. This is a design issue (confusing naming of stomach vs hunger vs energy levels), not a bug per se, and not related to the sticky stuffed status.