[1.1.30] Desync vanilla after starting to place rail

[tetryon]

Hi,

I was on AssemblyStorm's vanilla MP server with about 8 players including myself. I'm told there had been some desync issues earlier in the day with others.

I had clicked on some old blueprints from my personal collection (so they would transfer in). Seemed to be no problem. So not sure if that's related but wanted to mention it.

I was then stood near some existing tracks and clicked to add more tracks (but did not complete them) and got the desync 1-2 seconds afterwards.

After a while I logged back in.. and was a 3-4 second walk further left then when I desynced, which was odd. So I walked to the right, and then it desynced again just a few seconds after getting logged back in.

https://we.tl/t-PYNi2mCYZr - 1st time
https://we.tl/t-eY5lDLCBjI - 2nd time

[boskid]

Thanks for the report, unfortunately i was unable to find anything interesting in both of those desync reports. Differences were all around including fluids, heat pipes, construction robots, positions of some entities but there was no differences with rails and trains or i was unable to spot them. When i was running both of the reference files in MP for some amount of time there were also no desyncs. I will need a better reproduction steps, simply "it happened" unfortunately is not enough.

[tetryon]

Understood. I can't really give any other info since it wasn't anything special that I did either time. I actually tried again to join just now and was successful without desyncing.

The server is also randomly desyncing for several people now, including an <unknown-username>.

https://imgur.com/a/QGOJhoW