I'm sure I've seen this mentioned before here, maybe I'm going mad.
When I raise my wrist and the watch screen lights up, every now and then I hear a clicking/ popping sound... Does anyone else get that?
My watch is on silent.
It is probably your band connector. My top connector is loose, and taps the watch when moved in a certain way. The bottom one is snug and doesn't do that.
Stainless with black classic band.
I took it to the Apple Store and every single stainless steel watch had the same exact issue with every single band except the stainless link band.