Using IOS Kishi and touchscreen at same time

Hello. Just got my Kishi a while back. I have been playing on Roblox and it works mostly great... except I like to use the touch screen to turn (instead of using the right analog) a long with the left analog to move. But when I do that it seems to make the in game movement with the left analog stick, stop, or stutter when moving. It seems they ought to work together seamlessly but they don’t?