Weighted Ring Muscle Up Condundrum Hi guys. I'll keep this short.

My weighted ring muscle up has been steadily increasing, I've always kept my form super strict and kept myself injury free along the way. Went from +10kg at a 95kg bw to +30kg at 94kg. 

However, my unweighted muscle ups have stayed exactly the same. A few years ago my max was 6 reps (when I weighed 85kg), now my max I still 6. I got myself to a 50kg chest to bar chin up (strict, no form breakdown), I can do 5 +20kg false grip pull ups. During my push days I train weighted/unweighted MU transitions. 

So in brief: my push and pull strength has increased dramatically, yet my bodyweight ring muscle up reps haven't increased at all, even though slow straight bar MUs have gotten a lot easier.

What gives?