It seems that it was indeed just this mod causing the desync. I thought I had disabled the mod, and I might not have (somehow), but deleting it works well now. Sorry for any potentially wasted time..

I explicitly remember disabling the mod when we started removing a couple mods that would have connection with movement and I restarted my game with this disabled first which had the issue persist; as such we concluded that it could not have been that mod but I will retest it later and contact the ...

I will preface this by stating that I'm rather new to the forums and have not tested much with the individual mods to see if it's a modding issue and that I've been redirected here from https://www.reddit.com/r/factorio/comments/1ooj3d2/comment/nn4g5gk/?utm_source=share&utm_medium=web3x&utm_name ...