starting scribbles are wrong size on iOS

[zeke]

The scribbles get chopped off, presumably because the canvas is narrower than the expected width of 512

[Pwntus]

Adding relevant report:

But some time ago it begins working with some mistakes.
Not at all mobile devices, but often it begins use only a quarter of drawing area,
sometimes mirroring it vertically upsidedown.
Then it begins ignoring drawing at all at the same devices. Now it seems to be not
working at devices, where it worked properly and perfectly.