Was wondering if anyone has had this problem and if it's fixable without replacing the entire lense.
The plastic lens seams to be separating from the frame of the light assembly. Really don't want to buy a whole new tail light because it won't match the other three lights. Which would make me replace all of them.
Take it out and try to press and set it right with some adhesive?

 

Yea, I'd just try and glue it back. Do not use Gorilla glue or super glue.
Use something like Goop or maybe a 2 part plastic epoxy.

A pair of these clamps has been really handy in my garage for all kinds of projects. I can't tell you how many times I have used them. They were a gift I never thought I'd use, buy now, I couldn't do without them.

 

I fixed the same issue on my 964 using a Goop plastic adhesive glue (clamped for at least a few hours). Worked great.