MathCad Prime 9.0 - extremly slow performance

I have a very strange problem with this new mathcad. So the situation is that with a file of only 1.5 mb (something about 30 pages), page scrolling gets stuck and even when entering text (ctrl + T), writing a little faster, the text appears with a delay of several seconds so that it is impossible to In this case, work comfortably, I won't write about the rest because it covers only such basic functions. And the question is what is the reason for this functioning. A month ago I bought a new Asus TUF 15 computer but I returned it after some time because I didn't like it, now I have a new Acer Nitro 5 for a week and the problem is the same in both the first and second case, so it shouldn't be a hardware issue because I have new ones components good enough to work on 10 such mathcads at the same time.
As for the rest of the actions I took, even when I switch Mathcad from AMD to NVIDIA (RTX 3050), the situation is the same.

I will be grateful for an answer as to why the program behaves this way and what else I could do to fix it.