Just set up a Deco P7 system with three nodes. Wired connections are fine, but our iPads and iPhones lose connection to the internet all the time. The connection to the Wifi network is fine, three bars, but they keep losing a connection to the actual internet. This happens all the time, leading to pauses in streaming and surfing for about 1-3 minutes. Then it comes back.
The iPads are no older than 2 years.
Things I've tried:
Powercycling the nodes
Updating app and hardware
Resetting network info on the iPad and restarting it
Giving the devices "high priority" in the app
Disabling fast roaming