I was kinda sure there was a topic for reporting these, but I can't find it, sorry :(
The have a long grey line, approx. on the height of the HAs waist. Just discovered this when I removed the base with , it's not obvious when you have the base visible...
It took me a minute to see what you were talking about, but yes I see a tiny grey line right above the avatar's left wrist(our right).
Here's the original:

and a bigger version

I circled it so it would be easier to see in the larger version

thank you for the pictures, should have thought of doing screenshots :'D
Thanks guys! I've added this here: ⭐ Stray Pixels on Wearable Previews