Why are solos/mists suddenly trash?

So for a while while running solo dungeons/mists (t5-t6 yellow) I was consistently walking out with 100k give or take.

I'm not sure what happened but at some point I just stopped getting loot. Mists are pretty much books 75% of the time and I maybe walk out with 20k in from solos. I even bought 5 6.3 solo maps and did not break even a single time.

Even blackzone solos don't seem to be dropping anything. Am I missing some kind of mechanic? Is this because there aren't enough items being sold to the black market?