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Hey, I can't tell what's caused this since I'm not experienced with CorelDraw, your file needs to be edited universally.
I tried it with Illustrator and Affinity Designer and get the same result.

qwe.gif

ewq.gif

There is a rectangular background clipped into a cross. Maybe you did expanded wrong layer, maybe it's just not supported when you export.

Oh thank you very much. I think I know what the error was.