Originally Posted by bonefishdick
I may be wrong but it could be just a case of to much line speed combined with the weight of the popper that when line turns over it hinges at the end causes he "L"
Try slowing down the cast to allow the line to turn over and just drop. I would think that if you make the same cast without the popper and the line turns over and then bounces straight back rather than forming the "L" at the end it is a case of to much speed or power on the forward stroke.
+1 here. You'll get the same effect with a 2-hander if the fly is too large for the line/leader to which it's attached.