Proxies of some providers can give out the IP addresses of your dns servers in addition, some services through their partner dns servers allow you to track your actual address.
Users can check the leakage of DNS servers on these best websites:
In case you want to stop the potential leaks you can define another custom DNS server through the settings of the browser profile. To do this in Gologin follow the steps:
Access the side settings by pressing the "Settings" button on the profile;
Navigate to the Proxy & Location tab and start adding your Custom DNS;
Remember that the custom dns will only work with a VPN direct connection or SOCKS4 or SOCKS5 proxy. Users must provide the address of a real DNS server to assign a custom DNS.
You can use public DNS servers, but those corresponding to your public IP address by location are recommended.