Dimmable LED flickers at 50% or lower on Shelly Dimmer 2?

I'm trying to wire up some dimmable LEDs to a Shelly Dimmer 2.

The LED is a 9W dimmable model.

However I seem to have a lot of issues with flickering, particularly at lower dimmer levels.

This is how I've wired it up:

• Power cord active goes to the middle "L" terminal on the Shelly Dimmer 2
• LED dimmer active goes to the right-most "O" terminal on the Shelly Dimmer 2
• Neutral from power cord and LED dimmer goes to a screw terminal, along with a short bridge conductor down to the "N" terminal on the Shelly Dimmer 2.

This works well at 100% (i.e. not dimmed).

I then did a calibration on the Shelly Dimmer 2.

At 100%, there is no flickering. However, even at 50%, there is very noticeable flickering. 30% it's psychedelic.

I then added a Shelly Bypass, wiring it in parallel on the output line:

It no longer flickers at 50%, however, it still flickers at 30%.

Question:

1. In my case, I do have a neutral wire. But should I still be using the Shelly Bypass? (It does seem to make things better, but just wanted to confirm it was the correct thing to do).
2. Does anybody have any tips on how to reduce the flickering? I do want to be able to use it at say 20% or 30% output, without flickering if possible.