Slow-scrolling on the phone

Hi! I'm a senior graphic design student in college and I am learning how to prototype in one of my classes. We connect our phones to our computers so we can see stuff as accurately as possible in a real setting, but one of the most frustrating things about it is how long it takes me to scroll down the page. It is super laggy. I have tried the scale to fit, scale to 100, and freeform, but they are all just very slow to scroll. Is there any way to fix this where it's useful or is this a bug that hasn't been fixed?