no data on UI after firmware upgrade to 1.9.1

I have updated one of my dw-2 with the 1.9.1, and now the UI is unable to show any data:

I've also tried a factory reset and some reboot.

Also, at this point I can't recalibrate the tilt sensor and I'm unable to downgrade the firmware (the device reboots, but after that the firmware is still 1.9.1)

Any idea about how to solve this problem?

Best regards.

Also, the WiFi is now always on, and the battery is drained quickly.

By the way, now the state is never sent via MQTT (I hear the click of the sensor), but periodically I see:

shellies/shellydw2-kitchen/online true
shellies/shellydw2-kitchen/announce {"id":"shellydw2-kitchen","model":"SHDW-2","mac":"40F5202D9A85","ip":"10.42.20.60","new_fw":false,"fw_ver":"20200818-12040
7/v1.8.2@36539b0b"}
shellies/shellydw2-kitchen/sensor/tilt 0
shellies/shellydw2-kitchen/sensor/vibration 0
shellies/shellydw2-kitchen/sensor/temperature 21.20
shellies/shellydw2-kitchen/sensor/lux 0
shellies/shellydw2-kitchen/sensor/illumination dark
shellies/shellydw2-kitchen/sensor/battery 100
shellies/shellydw2-kitchen/sensor/error 0
shellies/shellydw2-kitchen/sensor/act_reasons ["sensor"]
shellies/shellydw2-kitchen/online false

Zitat von SebMai

Downgrade.

The 1.9.1 seems removed

Thanks.

Unfortunately, doing something like http://10.42.20.60/ota?url=http:/…HDW-2_build.zip

doesn't seem to work.

Is there a way to force the downgrade?