So lets just assume that there are 2 sets of active stone blocks apart from each other well when i would wire it up and flip a switch it would not become inactive On first flip and then if somones joins server after that they would say blocks are inactive and be able to go through though still appearing to be active for me. I would flip it again but it becomes inactivestoneblock for me and activestoneblock for them.
Also usually when i flip switch with 2 sets of activestoneblocks some would be on others would be off etc.