About run to cursor (Alt + F9) in Windows 10

Hi, I use Pycharm Community in Windows 10, and find some problems with "run to cursor" (Alt + F9) in debugging.

In my project, I can not use "run to cursor" when I am debugging. when I use "run to cursor", the codes will not stop at the cursor, but directly run to the end.

And I rewrite a simple example to test it, such as ten lines of codes, "run to cursor" still works.

I feel confused about this. Is it a bug? Or do I make anything wrong?

Thanks!