Yes, ever since IOS 14.0.1 I’ve been having the same problem: My iPhone XR connects fine to our WiFi (5 ghz only), but after leaving it locked (idle) for a few hours and then unlocking again, I find that the iPhone has lost access to the internet and even our local network, I can’t ping my router or access any webpage. So I open my PC and login to the router from there and find out that the iPhone isn’t even showing in the connected clients section. Which means that it disconnected on its own for some reason. But the weird thing is, the iPhone still shows as connected to WiFi (WiFi icon in status bar) and when I open connection details, I can see that it still has its correct IP address, DNS, etc. Only way to fix this issue when I encounter it, is to toggle WiFi off and on again. This issue happens at random times, and only when I leave iPhone locked (never happens while using iPhone) Updating software to IOS 14.3 didn’t fix it. We have an iPhone 11, iPhone SE, iPad Mini 5, and Apple TV in the household (all latest OS) and none of them have ever had this problem. I have also made sure that our WiFi router is configured with Apple’s ‘Recommended Settings’, but the issue seems to only affect my iPhone. I tried: resetting network settings on my iPhone and then disabling private MAC address before rejoining my WiFi network. Toggle off ‘Network & Wireless’ in Privacy -> Location Services -> System Services. Toggle off WiFi-Assist in cellular data options. Delete my VPN configuration. Disabling MU-MIMO on router. But none of these things fixed the issue. It’s very annoying because when the issue happens, my phone cannot receive any notifications from apps. And I always have to manually toggle WiFi off and on to get things working again. If anyone else experienced this problem and has a working fix, please post it.