I'm going by the picture and the reply from Walther posted in post #1 of this thread:Describing, discussing and researching an issue does not sound like the definition of whining and the question remains formally unanswered unless you have the test data showing that it is only cosmetic. If you have such data please post it because there are many here who would like an authoritative and final conclusion to that particular issue.
Final response from Walther:
I just double checked with the master gunsmith here. This should not cause issues with the functionality of your handgun.