Unfortunately this isn't going to be a high quality report, sorry about that, maybe it can be additional info to add to other reports.

Last night while on 1.06.152804 I noticed I was regularly getting items that would not move from my inventory to a barrel. It wasn't all items. One item would refuse to move while another one would move fine. It didn't seem to be specific items, one stack of planks would move and the next wouldn't. Also didn't seem to be a local state issue, logging off and back on didn't fix it or show any invisible/already moved items. Server (US 1pp exp) had about 10-15 players and looked to be running fine so didn't seem to be server performance unless item persistence is a separate overloaded thread.