1. Choose the server, join it and play for some time.
2. Leave the server, don't close the game.
3. Rejoin your server after some time.
4. Play up to 15 minutes and experience game crash.
NB. If you rejoin any another server there wouldn't be any crashes. You should rejoin the server choosen in step 1.
Maybe it is connected to issue "0009032: Weapon in hands dupe", so you need to try it with two weapons (one in hands, one on the back) to reproduce. See 0009032 for details.