Invalid MAC of handshake, dropping packet

I have an issue with DNS sometimes when I use firezone (DNS_PROBE_FINISHED_NXDOMAIN), wireguard logs tells this string: “Invalid MAC of handshake, dropping packet”. And command “wg show” doesn’t show up peer connection, I have to connect and disconnect multiple times, until it finaly connect.
In infrastructure I have two firezone servers connected to one postgres database, and this two server connected via network balancer in amazon.
I checked private keys on both servers and they are differ.
Does it key issue or it’s something else?