Intermittently Losing Internet Connection

Hello, My Volumio v.2.909 is intermittently losing internet connection (problem started a few days ago) when playing music. To rule out wifi issues, I disabled wifi and went with a direct ethernet connection with a reserved ip address, which did not resolve the issue There is no pattern or anything, it just randomly loses internet connection, sometimes reconnects after a minute or so. I am running Volumio via RPi4 with a Hyperberry Digi + Pro. I have been using this setup since May and never had this issue.

Has anyone experienced this issue before?
What could possibly cause this?
Will I need to re-flash my sd card?
If so, is there a way to save the configuration, playlists and plug ins?

Any advise will be much appreciated. Thanks in advance.

It might be worth having a look at the system log to see if it gives any clues.

Would you share some system logs please?

There is a simple plugin that gives limited backup, but you will have to reinstall plugins etc. if you flash another sd card.