[delopsu]

Hm. What OS do you use? It works fine (for me) in Firefox on iOS. Haven't tested on Android.

[01HNNWZ0MV43FF]

For me, Firefox on Android, I get this:

One stroke draws one spot at the starting point. Any number of further strokes draw nothing. When I tap outside the canvas I can draw one more point

[delopsu]

Could you please try it now? Pushed a fix, but have no Android to test it.

[janwillemb]

Still only one point