Something is very wrong here, lol...

Error ClientMultiplayerManager.cpp:1081: mod-ftrainworks was registered for the following events when the map was saved but has not re-registered them as a result of loading: on_gui_click (ID 1), on_gui_checked_state_changed (ID 3), on_entity_died (ID 4), on_built_entity (ID 6), on_robot_built_entity (ID 18), on_train_changed_state (ID 31), on_robot_mined_entity (ID 73), on_player_mined_entity (ID 74), on_space_platform_built_entity (ID 78), on_train_created (ID 81), on_gui_opened (ID 102), on_gui_closed (ID 103) and ftrainworks-left-click (ID 219)

Oh right forgot, this happens when rejoining a multiplayer server.

Appreciate the heads up. Working on rewriting the mod to work better on multiplayer! :)

Gotcha, very appreciated! I also just now saw the update. Ran into the desync yesterday and only now got around to reporting it so I hadn't noticed there was an update yet. Will download it and let you know if I run into any other issues. It's a very cool mod concept, and I'm especially interested in the train sensor!

This has been resolved in v1.1.0! Tested with my friend and seems to be working now. Thank you for your kind words!