User blog comment:Animegeek1689/Does Issei really love Rias?/@comment-115.164.62.175-20170818144636/@comment-200.32.249.131-20170819201050

I don't think that counts. The second half of episode 10 as well as episodes 11 and 12 of season 3 were anime only. Those events don't happen anywhere in the light novels, so I don't think they count as cannon.