Ok.
How do you connect? Is it via normal WiFi connection settings or some Android specific quick connect option?
My best guess is that if it’s some OS level tricks, it may supersede the Blokada configuration on a lower level
Just switch on the mobile wifi hotspot in other mobile where excess data present and connect it via WiFi in my mobile.
In simple terms, when I connect to WiFi, the ads come as usual and when I connect to data, ads never appear.
This phenomenon occured with various WiFi Hotspots.