Problem with "Return to page size" function

Hello,

I have a fairly disturbing problem in Corel Painter 2020. It always comes with the same manipulation, namely by clicking on "zoom adjusted to page" (Window - Zoom adjusted to page). For example, if my document is enlarged to 200% and I want to return to the page size (in my case 23.4%), Corel closes / crashes without warning so that I will lose my work if my work was not previously saved. As Corel Painter has no "auto save" function, danger is real. Do some of you have any suggestion? Thank you for your attention.