Okay thanks for confirming, you can get around this particular issue. To allow access to your wifi extender using its name address, you will have to set Blokada to use “network provided DNS” in the Networks tab. I can’t remember the specific instructions to do this as I don’t have version 5 on any of my android devices (not compatible). I think there is a post somewhere around here showing you the steps, will see if I can locate it…
Edit: I think this is it. How to use Blokada 5 Networks feature?