.svg charts look bad in CorelDraw

Why charts made by plotly and downloaded as .svg looks bad in CorelDraw (tests made in X8 and 2018 versions)? Another not-true-svg graphics redactors (like Krita or GIMP) don’t show these charts as you can see them in CorelDraw. Also, charts look good in browsers.

It is a problem with CorelDraw or with plotly?