I have had an Archer AX3000 in use since FEB of this year and have enjoyed it without issue. However, all of sudden and with no precipitating event, several** of my spouse's and my iphone's apps can no longer connect to the internet on our wifi network. I power cycled both our router and modem as well as performed a factory reset on the router and ensured the firmware is up to date. All our apps work fine on other people's wifi networks. Additionally, our computers (one PC, one MAC) both work fine on our wifi network. It's just certain iphone apps and it just happened yesterday.

**Apps which DON'T WORK AT ALL (no internet connection) include (but perhaps aren't limited to): App Store, NYT Audio, Reddit, Software Update (in settings), Cinemark, Lyft, Target, Amazon, Etsy, VRBO

Apps which PARTLY WORK: Chrome (can get google results but no other sites load), My Verizon (seems to load but I can't sign in)

Apps which SEEM TO WORK FINE: Youtube, Instagram

Changing the security or channel doesn't seem to help.

Any ideas? It's frankly just baffling and I hope there's a solution that doesn't involve me having to buy another router after I just bought this one about 4 months ago.