Here is the issue.
1) I had a blueprint in my inventory and green wire in my hand
2) I put green wire in the inventory in the slot with blueprint
3) I got an errror and crashed. After that the desync loop happened.
That crash caused a desync loop on the server.
No one could connect after that crash.
[0.12.2] Crash related to blueprint
Re: [0.12.2] Crash related to blueprint
This sounds very similar to https://forums.factorio.com/forum/vie ... =7&t=14383 but I couldn't reproduce the desync loop.