Both me and my brother got kicked out from a server at the same time, thinking it might've crashed / restarted.
We reconnect to the same server, spawning where we were before getting "No message recieved" the first time. I start to unload a Makarov mag. which results in me getting "No message recieved" again, while he could stay on the server and continue playing. I tried reconnecting but was met with "Character locked in database", so we decided to wait since he could still see my character on the server. We waited about 15-20 minutes and I was still locked and he could still see me on the server, so we decided to kill my character to see if that helped, which it didn't.

Here's a clip of what happened (Reconnect -> No message recieved): Twitch Clip

My profile: https://steamcommunity.com/id/xampew/
His profile: https://steamcommunity.com/profiles/76561198098099200/
In-game character name: XAM
Server: SWE 2-1