Beta tester here. I used to be able to record wifi calls at home. After phone upgraded to 8.0 Android I can't. HOWEVER, I turned off the Try Recording on Wifi, and then it worked, BUT it's at a much lower volume, as is also regular cell call recordings, even if I boost Audio Gain a lot. Pls see Issue #2710 - I submitted without logging in so it shows as anonymous. Thanks.
Issue #2711 resolved