Discord not working with whitelist - cannot join to call\server channel

### Please answer the following questions for yourself before submitting an issue.

- [X] I checked the [knowledge base](https://adguard-vpn.com/kb/) and found no answer
- [X] I checked to make sure that this issue has not already been filed

### AdGuard VPN version

2.4.0 (1475)

### Environment

```markdown
- OS: Windows 10 Pro, 22H2
- Other network-level software: windows firewall
```

### Which DNS server do you use?

Default

### Custom DNS

_No response_

### Use Wintun

- [ ] yes, I do

### Issue Details

Steps to reproduce:
(see screenshots)
1. Enable whitelist - vpn is active only for selected applications and sites
2. Add Discord in applications
3. Add Discord in sites from list (add site -> from list -> messangers -> Discord)
4. Open Discord - join channel. See message "connect to RTC", then "route not set"

### Expected Behavior

Join to server channel, can talk with my frends

### Actual Behavior

See message in discord "connect to RTC", then "route not set" - cannot talk to my friends :(

### Screenshots

Screenshot 1


Screenshot 2


Screenshot 3


Screenshot 4


### Additional Information

_No response_