Just to follow up on this a bit I took a look at the code to try to understand why this has always been a problem in /kbin/Mbin. It seems like from cursory reading it will try to send out unsub/unfollow requests on blocking magazines/users even if you aren't subbed or following them. Assuming this is accurate, this has some benefits to make sure the remote removes you, but has the downside of calls to the remote needing to be working in order for a block to happen. I'll try to take a look at making it only send those unsub/unfollow requests if you currently are according to local and see if that makes sense to others