Actually they should never offload a bag period, unless the pax is a no show or offloaded. Pax should not NEED air tags (though this is obviously a huge deal around the world in recent times).
For me, the issue is about the comms and efforts to resolve in a timely manner, not about whatever happened per se. If status is supposed to mean anything then surely it is about the care and effort taken to keep a "valued" passenger up to date. Even if there's nothing to say. It's often the service recovery that people remember than the problem itself imo. This service recovery, so far, seems poor.
Of course why any bag might have been unloaded in PER or otherwise lost is an issue for PER to figure out. You'd think through bags would be in their own container and be left on the aircraft, but who knows what happened. To me that is the secondary issue (unless an ongoing issue).
Hopefully it shows up soon.