Initially it works, but after I reconnect I am reset again and can't switch with "Venomazz" because he already got switched to the prior "Veno-". I guess this is a mod problem then.

Hey,

I'm currently playing with ~10 friends on my own server and we have a couple of 100 hours on the save.
Now I just changed my Factorio username from "Venomazz" to "Veno-" without thinking about the possible consequences of that.
We're playing with the "OARC" mod so that we spawn seperated from ...

Hello,
What did you do? - I played for about 11 hours, walked south into my base while not doing anything at the same time and crashed.
What happened? - The game crashed without anything unusual happening.
What did you expect to happen instead? - Not crash.
Does it happen always, once, or sometimes ...