I would like to report a multiplayer desynchronization issue that seems to be caused by this mod.
My friend and I were experiencing immediate desyncs upon joining the server. The log showed multiple Multiplayer desynchronisation: crc test (heuristic) failed errors.
We performed isolation testing:
We ensured that both the host and the client had the exact same mod version and startup settings.
The desync persisted when Trainworks & Couplers was enabled.
The connection became stable immediately after we disabled this mod (while keeping other mods active).
It seems there might be some non-deterministic logic (e.g., iterating over tables using pairs without sorting) affecting the game state simulation.
Here is a snippet of the error log:
code
Code
Error GameActionHandler.cpp:2808: Multiplayer desynchronisation: crc test (heuristic) failed for crcTick(...) serverCRC(...) localCRC(...)
I hope this information helps you investigate the issue. Thanks for your work on this mod!

serverCRC(2047297853) localCRC(4053748416)
333.879 Error GameActionHandler.cpp:2808: Multiplayer desynchronisation: crc test (heuristic) failed for crcTick(135642048) serverCRC(512756418) localCRC(2694346990)
333.889 Error GameActionHandler.cpp:2808: Multiplayer desynchronisation: crc test (heuristic) failed for crcTick(135642049) serverCRC(2757027734) localCRC(2531806212)
333.901 Error GameActionHandler.cpp:2808: Multiplayer desynchronisation: crc test (heuristic) failed for crcTick(135642050) serverCRC(1733560713) localCRC(3167995417)
333.911 Error GameActionHandler.cpp:2808: Multiplayer desynchronisation: crc test (heuristic) failed for crcTick(135642051) serverCRC(1210243736) localCRC(3106753096)