Continuously drawn lines are sometimes broken

[shrx]

In rare occasions (2 in the attached screenshot) the continuously drawn line will become broken.

Tested in waterfox 6.5.6 64-bit on WIndows 10. Maybe also something related to fingerprinting?

[1j01]

It could just be a faulty mouse. Only saying this because I've noticed this sort of behavior before and then realized it was a faulty mouse.

Could also be a bug in jspaint, the browser, or the graphics driver.

To investigate this properly, we could record the pointer events that led to the drawing of the line, and see if there's a reproducible case where certain points lead to an invisible segment.

Actually, first of all, if you undo, does it undo the whole line, or just half of it? Does it create one or two history steps?

[forbenaj]

This also happens in circles