help, I was just /sit in front of the fireplace, and somehow the invisible armor_stand stays under the block, cant be removed, cant put block on it or destroy a block..

This mod does not add a /sit command, and does not spawn armor stands. My Sit mod in particular (https://www.curseforge.com/minecraft/mc-mods/sit-fabric) also has to be installed on the client and the server to work properly.