The Adlist has also increased; this seems to be an automated process, I have no control over?! Hence, it may have updated itself and since then behaves like this?
Please upload a debug log and post just the token URL that is generated after the log is uploaded by running the following command from the Pi-hole host terminal:
Gravity is updated Sunday morning at a time randomly selected (during install) between 0300 and 0500 your local time. In your case, this is the cron line that does the weekly gravity update:
Your Pi-hole updates gravity at 0320 your local time every Sunday.
It is normal for the number of domains on any public blocklist to change on a regular basis. When your gravity updates, you capture the new updates to the list(s).
I have, since my OP re-installed the pi-hole docker container, which made no difference.
After the debug log ran, I could see it blocked the two test domains. Meaning blocking is working.