(Lemmy) blocking an instance while subscribing to a community on that instance yields an empty community

This was discovered by Jim East:

https://slrpnk.net/post/27305276/18006810

I must say it fails the principle of least astonishment. If a user blocks Lemmy.World but subscribes to !linux@lemmy.world, for example, they obviously want to exceptionally see content in the subscribed community but nothing else from that node. But what happens is the instance block overrides the specific community subscription. So the general rule is prioritised above the specific rule.

And worse, when visiting the subscribed community it just shows no posts without reminding the user that they have a relevant block in place.