Been this way for us crossfire users for too long now. We do seem to get little love, it doesn't even surprise me anymore to be honest, I'm used to it now. Crossfire is a broken mess in bf1, SP seems excellent for the most part, however going deeper into the campaign I experienced the same texture flickering and horrendous scaling moments as I experience in MP. Ballroom Blitz is an absolute catastrophe off a map with crossfire enable - negative scaling and flickering buildings/courtyards in the centre of the map. My usage on both cards drops to 30% on that map, I've never ever experienced such crap with a crossfire profile.
Crossfire is dead to me, I just turn it off in games now and deal with average performance on a freesync screen.
Just make sure you post a report mate, we are a minority, but we need to keep reporting it. I'll be posting another crossfire failure video on youtube later.