So this has been a recent issue, and I think my tranny may be slipping. Anyway, just want some input.

So typically when I first start up the car and let it warm up a bit, the first time it shifts into second gear, it feels like there is a little bit of wheel hop. At first I thought that's what it was, but it does it even at like 3k rpms, which really shouldn't spin the tires.

And today I actually got on throttle after it had warmed up (drove for ~30 mins normally to work) and instead of 'hopping' it felt like it just slipped for almost a full second.

I guess it could be wheel spin, but just wanted to see if anyone else has this issue.

Note that I am using a B&M shift+ on setting 1

 

Try trouble shooting it by doing a few wot shifts with it enabled/connected, then try some with it disabled/disconnected.
It may be using too low of a shift pressure and could be an artifact of the shift kit.