I have the Huawei mate 20 lite and it makes problems on instagram. For example, if I want to zoom in on images, it hangs and the next image appears below the image, although I did not scroll further.
For pictures, where there are many markings, it also depends partly and it takes until all markings are visible.
Is it the same with you?
Everything works great on my mate 20 lite. But also do not believe that this is the cell phone. Could be insta.
Just drive it down and up again.