Brush lag

Animating Dragon 6 months ago in iOS 0

1 iPhone 5c

2 10.3.3

3 when drawing the brush occasionally stops and then draws either a straight line to location b even when drawing curved lines or it turns the line into a dot

4 smooth drawing without this (lag?)

5 use any of the brush tools and it happens dunno what I did cuz it was working fine before and now it's doing this, I've tried to fix it via deletion and re-installation of the app and that didn't work, I am looking for a solution please help