There's a problem with the Mekanism fusion reactor (and the machines used to make the fuel for it) the chunk loader system that slind made is amazing but something in the Mekanism fusion reactor machines is having a conflic, when you unload the chunks with the Mekanism machine is it even with the chunk loader they glitch and stop working same thing with the reactor it's self.
The reactor "unforms" when you go very far from the chunk i want to chunk load it (the same thing happens without the loader)
Has this been fixed?, If I was you I would make a ticket and just mention it in slack support, staff are busy I'm sure there get around to it when there free