SVG is displayed with wrong size

SVG is loaded/displayed with wrong size when display scaling setting is changed.

1. Set display scale to 125%.
2. Launch svgsprite app. You'll get what is shown on 125.png screenshot (i.e. good looking image).
3. Change scale to 100%.
4. Switch back to app. You'll get what is shown on 100.png screenshot (i.e. wrong and damaged image is shown). To fix this, one has to restart the app.

This also happens on system with several monitors with different scale settings when the user moves app window from one monitor to another.

Qt 5.12.12 did not have this issue.