Asus?
This behaviour is straight from their own GPL code. It's how they designed it. You are either on the Release, or on the Beta channel. Not both. And if I publish the final release on the beta channel, people will get confused at the fact that the router will state that a new BETA firmware is available while it's a non-beta release.
It is what it is. It makes no sense to me and I thought it'd be an easy fix (new feature?) to check both repositories and report only the latest final if the option was not selected; or report the latest of either beta or final, whichever was newer, if the option was selected.
I'm sure my Nexus 6p was on the Android N beta and when it became stable, it auto-updated to the Final version.
Same with my Pixel XL now. It got the prompt to download the Android O a few months ago and I can bet once O gets an official name and get stamped Final, I won't have to do anything to get it OTA.
Same with my VM with Win10 pre-release, getting the released version pushed to it, then going back to beta when one is available. Same with my Mint Linux laptop.
OS/2 Warp 3 betas were different but then one had to order a stack of 5.25" floppies
If iThings are OK with that beta-only logic, well... I can't comment as I avoid that rotten company as the plague.
Anyhow, following this forum a bit more frequently is a good thing
Thanks again to
@RMerlin for always chiming in and helping us stick with the Asus routers.