Both me and my friend have tried using the gravestone consumable in #spiritual and in some other minigame and we didn't die after the use.

In some minigames this can be a game breaker :-\

I don't know, but it's a grave bug...

Unfortunately this is an issue with the Module API in that it can't detect someone spawning something like a gravestone. However this is still a problem in minigames like racing.

^ That. Module API can't detect gravestones, and who used them. Also, you can spawn gravestones with Lua, which ones not spawned by a player.