'GoJS canvas (canvas2d) blurry on 100% zoom

I'm trying to use GoJS to create some nodes using rounded rectangles and some text. This results in the following blurry rendering (at 100% zoom):

Not changing anything except opening the dev console (this acts like decreasing zoom it seems) results in the sharp image:

A similar look is achievable when zooming out to 80%. Is there any setting, ... I can adjust to get the crisp look at 100% zoom?

The same is true for the attribution text in the upper left corner:

canvas html5-canvas gojs

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Solution	Source