Hi,

In my last game I was sheriff and killed one imposter, but somehow the game got messed up and registered me as dead for everyone else.
In my game, I was alive and the imposter was dead, but for everyone else the imposter was still alive and I was dead.
I was invisible for everbody else, but was not a ghost and could do emergency tasks.

Maybe some syncronization issue, not sure.

So does it happen when you killed an Impostor? That is very weird.... That means your game thought he was a crewmate.
Yes it is indeed a synchronization error by the game due to a network lag.

Yes he was an Imposter

Edit: Okay, an update. The mod just seems to stop working as soon as there are other mods involved (maybe because they are no longer Crewmates?). Which is kinda unfortunate, because I think the Sheriff Mod would be especially funny if other roles were involved as well.

@Kriasrub this mod was one of the first public mods and was made for a standalone modification of the game. I don't know what mods you have installed. But adding mods will lead to a lot of bugs. (RPC Conflicts, Double Patching.......)