In Path of Valor, one of the daily challenges is to defeat 10 elite enemies. In Season 1, Province 5, Stage 5 there are 11 enemies - 3 on each of the first three waves and then 2 on the ‘boss’ level. After defeating this stage, Path of Valor shows 9/10 instead of having it completed. Had same issue in first Path of Valor, now it’s showing up again in PoV2.
I did 8-4. The first time it showed 9 of 10 left after I finished. I did 8-4 again and it showed I completed 10 of 10.
Check the PoV FAQs - if you’re not sure with anything, you’ll probably find it there. Or use function.