Pihole funktion off for random hours

Please follow the below template, it will help us to help you!

Expected Behaviour:

Running Pihole 24/7
iMac Mac OS 15.2

Actual Behaviour:

Pihole stops at random times for random hours. You can see it at this pic of my timeline: 2025-01-21 09.07.43.jpeg - pCloud
There is no action done by me, either at the beginning or the end of the silent phase.

Debug Token:

https://tricorder.pi-hole.net/eAnLDfDF/

Thank you for any advice
Peter

Looking your image closer, it was possible to note Pi-hole was receiving queries all the time.

Using an image editor I increased the contrast and manipulated the colors to make them more visible.

This was the result (click to expand):

Maybe your devices were using a different DNS server.

I noticed you configure your router to advertise itself as DNS server.
Are you sure Pi-hole is the only DNS server configured in your network?

Thanks so far.

The problem is that while Pihole seems(!) to be off, I get flooded with ads. Maybe there are queries, but the function is not as expected.

Regarding DNS server, here is what I have written in my router: https://e.pcloud.link/publink/show?code=XZkU4KZ3gmHRFvzD1VS8tBSfi0dhB6QV6QX

.26 is the adress of my pihole, 9.9.9.9 is alternative

Best regards Peter

Your image shows you have more than one DNS server configured.

Pi-hole is working as expected, but Pi-hole only works when you use it. When your router uses 9.9.9.9 you will see ads.

Remove 9.9.9.9 to make sure only Pi-hole is used.

Thanks again!

I removed 9.9.9.9 and configured the IP-adress of my ihole as alternative. It is necessary for my router to have an alternative IP-adress! Then I configured the same for IPv6-adresses. In addition I disabled the WLAN-device in my pi. It has another IP-adress, which is not directed as a DNS-server.

As long as I can see today, all is working fine. And I hope it will stay fine.

Thanks, Peter

Sorry, the problem is back again. Today after a coffeebreak I saw those ads again. What should I do additionally to the things I have done in my last post? Why is the behaviour changing when the Mac is left alone?

here my last log: