I have a new bike with exactly the same problem and same drivetrain (SRAM GX) as shown in this video:(not my video).
When pedalling with the chain on the 5th smallest cog, there is an irritating clicking sound. It is not loud enough to be heard on a busy road, but it is clearly audible when out in the quiet of nature. The cause is clearly visible in the video: one tooth on the 4th cog will pick up the chain and drop it back.
I live in a country where I do not speak the local language fluently, and I cannot get anywhere with the local shop. I gave up on trying to make the problem clear to them. I'm basically on my own.
What would you do?
Is it a good idea to just ignore the problem, and hope that it will go away once that tooth wears down? Will ignoring the problem cause damage (e.g. premature wear)? Should I try to push a warranty claim (I expect it not to be easy)?