Seems like my device just started allowing ads everywhere about 2 days ago. I have made no changes through all of this. I am also getting the hosts file copy fail. Data saver is off, proxy is off in apn, several reboots, tried 3.2, 3.3, 4.0.6.
Wow I did not realize how many ads were being blocked until now. Now it is all I see!
did the /system/etc/hosts increase in size after applying? You can also compare the hosts file with Adaway disabled and them enabled in a browser by using a link like;
If the file doesn't change, then you need to figure out why it's not getting written. The "hosts copy fail" error suggests that you don't have write permission - systemless hosts in Magisk enabled? Depending on which installed version of Adaway we're now talking about, you may need to enable systemless hosts in both Magisk and Adaway.
If the Adaway enabled hosts file is populated, then try going to one of the entries in the hosts file in a browser; it should be blocked.
"find somebody that you think is undeserving of your compassion and give it to them" - Christian Picciolini