Issue resolv.conf with error after reboot

[Jürgen_T]

Server operating system version

Ubuntu 20.04.4 LTS

Plesk version and microupdate number

Plesk Obsidian v18.0.44_build1800220614.18

After reboot the resolv.conf appears obviously wrong as follows:

# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 127.0.0.1nameserver 127.0.0.53

How can I achieve this order after reboot:

nameserver 127.0.0.1
nameserver 127.0.0.53