Blurred quality of chart in fabric

[TopherBrink]

Hi,

We use this plugin with 2.9.4 chart.js and 5.3.0 fabric.js
When chart added on fabric canvas, it looks like draft in bad resolution. Most of all it noticeable on fonts.
I tried disable dirty flag, but then chart don't render at all (just blank white resizeable space).

Maybe someone know, how to increase quality?

On image: left - label on chart, right - simple text. Same font styles.