This worked like a charm for me. Thanks for posting it! Asus support is a mess. The right hand doesn't seem to know what the left hand is doing. I reached out to them and they sent me a PDF asking tons of questions and requesting logs so they could troubleshoot the issue. I even sent them the link to this conversation and it didn't seem to help.
100% same experience. Not sure what magic was used to get the beta firmware on this forum from them, but it works!
Funny thing is, it only took me one time. I sent the report via the Feedback Page in the router's Web interface, included the logs from the router and, we'll call him The ASUS Guy, got back with me within 24 hours with the statement:
"This is a compatibility issue with Apple’s latest iPhone 17 series.
Please try the following beta firmware and see if it resolves the problem. Thank you."
And a link. So, I just assumed it's all known about and a general release fixing it will be out pronto. I also assumed that anyone who did the same report would quickly get the same link to the fix. Apparently not.