A small update, this inventory issue (your active "hand" slot is locked and you can't do anything) can be fixed if a friend tie you up with a rope and take the item he is seing you holding to put it on the floor. After what it is working again (you can untie yourself and grab it back, and use it with no issues).

Here we go, I got 9 recordings: (3p server, official, DayzNL 3664698, 64.95.100.140:2402), around 9am CET. In game nickname: Survivor)

It happened on every server I played so far (they are all vanilla). I am using a direct ethernet connexion toward the internet box, which is then using an optical connexion.
I will try to reproduce it on my side and get a record for you.