Clicking / Tapping when vibrating

I recently got a Fenix 7S Solar Sapphire.

Right from the get go I found the vibration to be irritating with an audible click or tap at the end.  

Trying to isolate where the noise is coming from it seems to be related to the watch strap bar.

The noise comes and goes depending on the position of the watch on my wrist. No matter how tight I have the strap I can't stop the noise all the time though.

I've tried to capture it in a video here. I have the strap very tight here to demonstrate how it comes and goes, but it happens all the time when I'm wearing it at a comfortable tightness.


You can hear it at 3 seconds and then 14 and 15 seconds. I also demonstrate holding the top right hand corner seems to silence it sometimes.

You may need to have your volume up high as it was hard to capture whilst on my wrist and using a phone at the same time.

So my question is, is this normal behaviour or do I have a faulty unit?