From experimental patch 1.21
Whenever I crash or relog I seem to have a 50/50 chance for my HUD bar to be disabled.
It only happens with the item bar not the status bars.
Using the hud button on keyboard doesnt fix the issue only going in to in game setting and disabling and re enabling hud fixes it had it twice tonight on spaggies exp chernarus. Hope this helps and if it is duplicate sorry about that.