Avast Internet Secuirty Dns Leak

Hello! Since i have Avast and connect to my vpn, i have dns leaks.
What could be the problem?

Does this help? >> https://www.dnsleaktest.com/how-to-fix-a-dns-leak.html

I was recently getting DNS leaks reported on DNS leak tests (https://dnsleaktest.com/) when connected to PIA VPN. The test showed 2 servers: one was the PIA server, so that was correct, but the other (leaked) one was an Avast server. That was very much not right. The way to fix this is to disable the Avast Secure DNS shield. With this disabled, all leak tests only showed the one, correct, VPN server. If you really do want to use the Avast Secure DNS shield, perhaps just use it when leaked DNS info won’t bother you, like when you’re not on VPN.