ex7000 frequently stops working; not providing internet connection

Commenting to bump this topic. The most recent post I can find with a solution is from 2019, and the solution is to restore to an older firmware and perform a factory reset. I'm having the exact same issue with my extender as you are, with almost the same setup. The extender is on a different floor on the other side of my house, but it has full bars for 2.4GHz and 5GHz. Internet consistently goes out and I have to power cycle to get it working again. I've also tried using the fastlane both ways 2.4 -> 5 and 5 -> 2.4, with no luck. The only difference is that when the extender isn't connecting to the internet it does affect my wireless devices. Pretty ridiculous that I can find threads about this going all the way back to 2018 and there's still no fix for it. Seems NETGEAR is more focused on selling their products than maintaining them.