DDNS unhealthy ... please HELP!

[hackaro]

hello there, I've a small NUC Home-Server with many dockers. And DDNS docker has always helped me in properly setting up my dynamic public IP4 and connecting it to my CloudFlare domain (and related DNS). Since sometimes ago (dunno when...) DDNS reports me as UNHEALTHY and on port 8000 I get an update status as UNSET: "Unset , 2562047h47m16.854775807s ago, current IP N/A, Previous IP N/A."

In my Cloudflare dashboard everything looks ok ... and the ip4 from my ISP is correctly registered to my domain.

I'm sorry to disturb you but I truly have no clue here on how to solve this problem; what I can think of is that I've recently install AdguardHome docker, which works on a dockervlan (same internal LAN but different IP from my NUC host) so that I haven't modified the dns daemon of my Linux, which is the NUC host OS, just because I wanted to prevent problems with DNS resolving. But I had to modify my home router (a Fritz!Box) settings to have internal and external DNS servers fields to point to the AdguardHome docker's IP.

The config.json is correctly under dns/data folder and it's semantically correct (never changed from the very beginning).
_ddns-updater_logs.txt

Thanks in advance 4 ur help!