904 slow 2-3 shift, should I be worried?

Well it's all back together, runs great and I'm much happier with the shift quality. 2-3 is quick and firm at WOT just the way I wanted it. I elected not to install the low/reverse servo spring that came in the TF-2 kit and it seems fine with whatever one was already in there, shifts into 1st and Reverse just fine; if anything a tad less harsh than before I installed the shift kit and when the valve body only had some holes drilled out in the separator plate from the last time it was apart. The only issue I noticed is there's still what seems to be a slight cross-leak causing a barely-noticeable occasional dragging feeling when coasting or maintaining speed on flat ground in 3rd gear. Hopefully it's not enough to burn anything up. It's the kind of thing I bet 99% of people wouldn't even notice but I do because I'm hypersensitive to how my car drives lol.

I did notice looking closer at the low/reverse band, looks like one part of it is a bit discolored and warped like it overheated, could that be causing the issue?