Possible issue with new AirPods Pro

I recently got a brand new pair of AirPods Pro directly from Apple’s website. However, something that I noticed about the charging case is that faint line around the case as presented in the pictures. Having owned the first generation of AirPods Pro, I did notice something somewhat similar. However, compared to the version that I used to own with the lightning connector of AirPods Pro 2 did not have this issue. Basically what I want to know is the following: is this something that can potentially be an issue or is this nothing to worry about? I guess I want to ask in the event I need to return them before the return window closes.

Also, I did contact Apple Support directly via text messages with theses same pictures and they said that this was normal, but I guess I just wanted to try and get another persons opinion to possible get some more feedback.