Shelly Motion in reboot loop

My Shelly Motion was not sending any updates anymore so I tried to factory reset it after I tried several times to get it to connect correctly. Although I held the button in for 10 seconds it took me forever to get it into AP mode. After it was in AP mode I reconfigured it and once I entered the WiFi credentials it started to go into a reboot loop (constant Blue/Red/Green flashing, short break and repeat). I am unable to get the device into factory reset or any other mode where I would be able to connect to it.

IMHO this is unacceptable. No one is able to really cut power since the device can't be opened and my device even seems to shot itself into a kind of unrecoverable state and there is _NO_ way to get it into factory reset for me.

What do I do now? Is there some kind of software which can reflash it over usb or clear the configuration section? The USB port definitely does show a device while rebooting...

With a lot of trying I got it back into AP mode. I factory reset it and reconfigured it, but as soon as I entered the WiFi credentials and hit save the same thing: reboot, reboot, reboot, ... I don't get it. It has been on to the very same WiFi for days and now it doesn't even want to connect it anymore?

Somewhere around 95% and yes I tried, but no change... The battery is probably lower now since it kept rebooting all night long.

Okay, so I managed to get access again - this time I configured the IP statically but it still reboots, although it was giving me pings for a little while on the new address... so it was def. able to connect to wifi.