Music Assistant applies speaker access checks to group changes, party and quiz listening, and sleep timers. Adding speakers to a group requires permission for both the target and the speakers being added, closing a gap where access to one speaker could reach others.
The changes also preserve an exit for someone whose own speaker belongs to a fixed group they cannot otherwise control. They can stop that group’s session to release their speaker; that action stops the shared session, rather than silently removing just their room.