I have a 1.15.2 server set up for myself and a couple of friends. I decided to set up some item shops for them to use. I have given their pex group the permission node essentials.signs.use.* so they can use all of the sign shops. For the most part, they can indeed use the shops, but in a certain area, none of the sign shops work for them. They work for me, and when I recreate the sign shops in a different area like 20 blocks away, they can use them. I don't know what's going on. Anyone have any idea what is happening?