Connection is lost when DoH/DoT is enabled

[TheHasagi]

Unable to reach any website while DoH/DoT enabled in server-type (DNS).

Steps to reproduce

Open AdGuard - Settings - DNS filtering - Choose a custom dns settings - choose any DNS with DoH/DoT - server-type DoH/DoT

Expected behavior

Everything should be in order

Actual behavior

Unable to open any website

Customer ID 1852396 (logs are available)

Your environment

• Adguard version: 3.0.195n
• Adguard filtering mode: VPN / Proxy(manual/auto)
• Device model: (e.g. Google Pixel)
• Operating system and version: 6 - 9

[ameshkov]

First of all, it uses wrong address for a fallback: Fallback is [fe80::2a3b:82ff:fe53:e8b1]:53

[ameshkov]

Second, we need a "record-everything" level log

[ameshkov]

The root cause: AdguardTeam/CoreLibs#638

[TheHasagi]

The logs are provided.

[admitrevskiy]

Done.

@TheHasagi Please, let me know if the user has any more problems with DoH/DoT