I have a fix for this, filing a bug to track.

Problem is that the glyph atlas is deciding on the scale at canvas draw time rather than at contents render time. So if you draw into a canvas where the scale is 1.0, record it as a picture, and play it back into a new canvas where the scale is 3.5, the text will be blurry.

This is part of my quest to get display list dispatching out of the way of raster workloads: #130141