It seems you're talking about xprivacy. I've talked about PMP-Protect My Privacy. Theye are two different modules. Xprivacy works at me without issue, on Marshmallow. Haven't tried yet Nougat. Maybe your issue is occured by unofficial xposed fw for nougat.
Uh, sorry for my misunderstanding
I thought you were talking about Xprivacy. Anyway, I try also PMP on ViperOneM9 6.1.0 and works fine for me. Seems a good module but the fact it's closed source change almost everything... spoken in privacy matters.
Maybe your issue is occured by unofficial xposed fw for nougat.
Yes indeed, should be that reason.