Edit: Ok didn't realize a few people have reported this. Leaving this thread up since it has the most testing done.
I tested this with and without bloodrush. I also tried testing this with mods on the warframe, on deconstructor, and on the weapon itself. Every single test resulted in the same outcome, crits stayed yellow, and did not increase at all even though combo meter was at 12x. I was wondering why things felt off. Details below:
I tested this with both Rhino (Frame A) without g