Cannot discover Zigbee after flashing

[vad0s94]

Flashing by OTA successfully finished, but the device is not discoverable by zigbee coordinator. Reinstalling the battery and RES + GND short have no effect

[devbis]

Maybe it is still in bluetooth mode? Difficult to tell, but you can always use soldering to write zigbee or bluetooth firmware

[ploszpe]

I have a similar issue.
I bricked the sensor by flasing the BT firwmare offered by the updater. After writing zb firmware 1.1, the screen went blank.
The screen is working/updating after flashing zb firmware over uart but it doesn't connect to ZB. (The firmware was flashed correctly, I read it back and there was no diff)
I also tryied flshing ATC_ota_40000.bin and updating to zb 1.1 using bluetooth but still no luck.

(An another senor connverted to ZB was able to join ZB network)

Please let me know if you have any idea how to debug/resolve this issue.

Thanks,
Peter