Unfortunately, not. I ended up sending back my Shelly devices. I did however test another brand of WiFi devices and that did work just fine. (wasn’t happy with the noise level of the lightbulbs though)
So it’s Hue ($$$) for now.
Looks like this issue is back again. After update 4.3.8 of the shelly app my Homey started rebooting again. After deleting the Shelly-app the Homey works fine.