Great an thank you for sharing the solution
yes, my dimmer is working fine with 5 x Phillips GU10 6Watt. Just had some issues with calibration (stucked at ~96 or ~97%)..
What I did:
- reboot the shelly with the hanging calibration by http://<shelly-ip>/reboot
- restart the calibration (WebUI - trailing edge)
The second or third calibration has finished and the lamps ar woking fine..
Not sure why your dimmer turns off after some time with max load.. either the device is "damaged" or the load is a problem ..
maybe you can try with a smaller load by temporary removing two or three GU10 lamps to see if that fixes the problem?