Dimmer 2 turning off lights after a few seconds

Hi! I an a newbie to Shelly, but had been playing with a test setup on a wooden board with a single filament bulb to learn how it all works.

When I moved the Dimmer 2 into new actual house circuit (with a neutral wire), the dimmer seems to be turning off the lights after a few seconds. I have used 3x 6W LED bulbs. Now I understand that you need a minimum of 20W without a neutral wire, but I am using a neutral wire. If I replace the LED bulbs with traditional filament bulbs, the lights stay powered on (and I can adjust the brightness as well). It leads me to think that either I have connected up the Dimmer 2 incorrectly, or that the power draw isnt enough anyway. Before I go and purchase a bypass I wanted to check to see if ther could be anything I have missed, or if anyone has suggested troubleshooting steps?

Thanks so much in advance!

Nick