The vehicle is buried in tiptronic downshifting ...

I just joined this forum and this is my first time writing. There is very useful information. I hope I have a friend who will give helpful information for the problem in my car. buried, especially if I do this uphill, it almost seems to stop and then suddenly shift into lower gear. of course it was jerky in this transition. Have you ever experienced this kind of problem ?? I'm waiting for your help..respect.