Dns server problem

Hello, my router always cachup same dns server, after rebooting sometime he cacthup best one by ping but in 1 min he change again to same slower one. Here is my diag.

https://nextdns.io/diag/a0d8cdc0-1693-11ed-bfc1-511fa1f61feb

Is there anyway to force it to use best one (closed one by ping)