

However this bug only affects IKEv2 connections (also known as Personal VPN). I am aware of this issue, it is indeed a bug, well what it seems like. However, I then tested this on my Mac and found that the bug was very much still there, and then tried Windscribe VPN on my iPhone and iPad and once again, upon termination of the VPN, my devices reverted to using my ISP's DNS server.

Strangely, last night, the bug seemed to temporarily disappear since I was able to connect to ProtonVPN on my iPhone and iPad, and then disconnect and go straight back to using AdGuardDNS as expected.

I have reported the bug to Apple via their Feedback Assistant webpage, and I suggest others do the same. Since this affects both AdGuard and NextDNS, it seems this is probably a bug with the OS, and not an issue on AdGuard's part - but I thought I would post it here just to make the team aware that it exists. There is a Reddit thread discussing this bug on r/AdGuard, available here. Settings app still shows AdGuard DNS as active but shows my ISP's DNS servers.Open ProtonVPN and start a connection (also tested with Windscribe).Select it as the DNS provider in settings (restart was required on iPhone for this to take effect, but strangely not on iPad or Mac).Install AdGuard DNS profile (also tested with NextDNS).This is occurring on iOS 14.2, iPadOS 14.2 and macOS Big Sur 11.0.1 (the latest public versions of all 3), and the only way to get the device to use AdGuardDNS again seems to be to reboot. When using AdGuardDNS on iPhone, iPad or Mac using the new encrypted DNS configuration profiles (available to download on AdGuard's website here), after connecting and disconnecting to/from a VPN service, the device reverts back to using the default ISP DNS, despite the Settings app still showing AdGuard as selected.
