Ipad Accesibility Zoom, navigating the screen is NOT smooth

Hello, I have got an Ipad 6th generation (2018) 9,7” WiFi

I have low vision and I use Accessibility features, specifically I use Zoom in order to read text.

as you may know in this feature there are two different ways to navigate throughout the screen

the first way is the triple-finger mode and the second is the Zoom Controller

everything was fine until an update… it was an ios update that was installed on late 2019 (surely before the IpadOS update)

from that time, navigating with the zoom controller is very rough/stutting/choppy!

The same is happening when using a bluetooth mouse while Zoom is on. Am I the only one? I have been waiting for an update to fix the problem but nothing happened (neither after the ipadOS). Apple?

P.S. I consider of buying the new Ipad Pro 2021. Am I going to have the same problem?