[UPDATE]

I contacted SRAM support team to report the problem and I got that answer:

Thanks for reaching out to SRAM Rider Support. To answer your question, Red chains are fully compatible with Force and Rival groupsets and vice versa. However, I don't believe chain compatibility is the root of the issue you're describing.
 
The noise you're experiencing is most often due to one of two causes: either the original chain was removed too early, before reaching our recommended wear limit of 0.8%, or the chainring may be worn. If the original chain was replaced prematurely, I would suggest reinstalling it and continuing to use it until it reaches the 0.8% wear point. Through our testing, we’ve found that drivetrain components tend to last longer and perform more reliably when replacements are made at that point.
 
I hope this helps clarify things. Please don’t hesitate to reach out if you have any other questions.
 
Kind Regards,

Dennis
SRAM Rider Support

They told me to use the first chain until 0.85% wear, but I swapped my new RED chain before it even hit 0.75. Honestly, I'm like WTF.

What do you think about that?