Popp Smoke Detector in group wont turn off

I have 5 popp smoke detectors in a zwave group assosiation (so when one detects fire all beeps). If I try each single it works fine, but one seem to have some kind of memory with the assosiation making it so I cant turn off the fire detectors in a test. All smoke detectors goes off as they should, and state goes to fire detected (as it should not), but the on/off slider if I turn it off it just go back to on so have to pull the battery.

Any experienced this and have some solutions?