Replying to Look PX12 Jib Binding Question

 So my PX12 Jibs have been releasing lately when I go to land my 5's or other things switch.  I'm not even landing in a horrible position or anything. 
Is this cuz my binding is shitty or because my DIN is at 7?  I'm 5'9ish and 145lbs.  I'm going into the shop soon for something else so just for a 2nd opinion, what do you all think?  Higher DIN?  I'm not crazy cautious but I'm not a DIN expert so I am wondering what is a reasonably safe # to be at.
I'm on Ar6's and these are the black PX12Jibs w/the neon green shock pad thing underneath if it makes any difference.  
Thanks.