TKR stiffness and pain

I had my tkr 9 weeks ago and my discomfort increases daily. I can painfully reach 110 ROM but can't hold it, every time I sit or take a break from moving I stiffen back up. I am scheduled for MUA in one week but my question is that I don't see anyone with this problem, mostly those who can't get the ROM to begin with. I keep my knee moving most of the day, walking, bike , bends and do see PT twice a week and dame thing there. Any similar problems? Any suggestions? Thanks Karla

Are you icing after exercise?