AdGuard DNS down which impacts AdGuard Home

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to report a bug and not [ask a question or ask for help](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a)

- [X] I have set up AdGuard Home correctly and [configured clients to use it](https://github.com/AdguardTeam/AdGuardHome/wiki/Clients). (Use the [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions/categories/q-a) for help with installing and configuring clients.)

### Platform (OS and CPU architecture)

Linux, MIPS

### Installation

GitHub releases or script from README

### Setup

On a router, DHCP is handled by the router

### AdGuard Home version

v0.108.0-b.51

### Action

> dig google.com @94.140.14.35
;; communications error to 94.140.14.35#53: timed out

> dig google.com @94.140.14.33
;; communications error to 94.140.14.33#53: timed out

### Expected result

AGH down if **Use AdGuard browsing security web service** and/or **Use AdGuard parental control web service** are enabled. They use:
`standard-block.dns.adguard.com`
`family-block.dns.adguard.com`

### Actual result

AdGuard DNS down

### Additional information and/or screenshots

_No response_