Shelly Dimmer 2 Unable to Calibrate

Hi,

I have installed 3x Shelly dimmer 2’s, all with no neutral and using the Shelly bypass.

2 of them work fine and are calibrated with trailing edge.

1 of them, fails during calibration. I can turn the lights on/off but then the Shelly disables itself over around 40% brightness. I assume it’s overheating so turning off to protect itself.

The one that is not working uses different bulbs. But if that’s the problem I don’t understand why these bulbs would cause it to not work - Bonlux ST64 E27 Edison Screw Bulb 4W Vintage ES Clear Glass LED Filament Bulb Warm White 2700K,40W E27 Incandescent Light Bulb Replacements for Decorative Ceiling Antique Pandant Light 4pcs https://www.amazon.co.uk/dp/B07GQLY8JG/…ding=UTF8&psc=1

Am I correct in that it’s the bulbs at fault?

Many thanks

Steve

So I’ve tried changing bulbs to another type. The Shelly did actually calibrate. However a bulb then popped and I don’t have proper control over the other.

Maybe this isn’t the bulbs I’m using and it’s the Shelly itself? Any ideas welcome

Thanks