Eheh sorry I'm not good in explaining things in english xD
I think I've not been clear...
This is how to reproduce the bug:
1 - You make a new empty, big canvas, or set the zoom level to 200% (it's the same, you need only the two scrollbars appear)
2 - You try to draw. The very first input you make, let's say the first milliseconds in which you are drawing, you are also moving scrollbars, so you go wrong.
3 - If instead, for example, you touch only the screen without moving the pointer, wait a second, then begin to draw, nothing bad happens and the canvas doesn't move while you are drawing
However I agree that is so a irrelevant bug to consider it almost a feature request
Don't mind anyway, nothing important, only liked to put in this thread a complete bugreport for "user awareness", not a to-do list for you, that you have done still too much for us