I used OBS for recording, but did have Steam and Discord Overlay running.
I also thought that pipes shouldn't be able to be do that?

Hi, Playing a multiplayer game (hosting and joining), and I cannot place a pipe connecting two petroleum pipes, but bots can? Same thing occurs with undergrounds. Playing around with this, caused the entire game to crash. (Turns out heavy oil and petrol are in the same pipe, which shouldn't happen?)...

Hey, getting the same error.
Was placing some new track and about to select a signal from inventory when everything froze.
Two trains are passing the junction I was working on, and I may be about to be hit by a train?
Version 0.17.47