Here is a crash report. Note. The server crashed at like 3 TPS:
crash-2022-01-08_11.37.45-server.txt

btw in the meanwhile you could use performant, it has an option to limit the amount of fluid updates per tick

Hi, thanks for the report.
The game quits because the TPS are too low.
I am currently working on an improvement mentioned in #28 which would also solve your problem.