Core with consistency?

Is there any core that guarantees consistency between server and singleplayer that something works in singleplayer will definitely work in the server?
I'm hosting a fabric server where some redstone contraptions break but they work fine in singleplayer. I tried removing all mods i installed and deleted the .fabric filefolder and problem persists.
https://www.reddit.com/r/admincraft/comments/1deq4pf/fabric_server_behaves_differently_to_singleplayer/
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