Mine is a mid 2014 retina 15 inch. I'm sure they will put in some sort of mini update soon. I've been using it off and on now and its at 54% at 1:47pmdidn't have that problem with this MBP, its a 2016 13 inch with Touch Bar.
but I've definitely had that problem on MacBooks and more specifically phones when they drop the new OS.
I even threw a new battery in my 2012 MBP to stop the problem, and its continued
glad you're shyt is fixed breh