2007 Vette A6 acting goofy on 4-5 shift...

2007 Vette A6
A&A SC Si Trim 7#'s
No other mods not even LT's.

No matter what I do I'm getting a delayed and then harsh engagement on the 4-5 shift everytime. All other shifts do as expected. Whether in D, S, or Paddle mode.

I've tried my aggressive settings and my mild settings and even the bone stock settings and it still does it. This is the first one I've had do this. I've tuned several other A6 vettes, but all have had consistent shifting.

I can't post the tunes until I get to my high speed internet, so bare with me on that.

Any ideas?

ttt

I dont know if it affects vettes or not, but randomly when I would change the tune on my 2010 ss it would have funny effects on the trans until I pulled the battery for a minute.