That's really weird, I've also ASUS DUAL RTX 2080 Super 8GB Evo and I'm having the same issue. I've just updated to the latest iCUE and I still have the same problem.
I've only recently had this problem occur and it's been working fine with the 2080S anyway so not sure if they're directly related.
Can I ask, have you resolved your problem and if so, how?
Cheers.