Dealing with copper filled problem in isoated area

Hi, I’m dealing with a problem where the isolated area is filled with copper. only one specific file has this problem, and the other files are OK, which means their isolated areas aren’t filled with copper.

and i found that when I copy and paste the design in trouble into the other normal file, it yields the same problem in that normal file. And when I eliminate the design in trouble, the problem-infected file recovered into normal file.

is there any solution to this problem? I’ve done everything what I can do and finally no idea to come up with…

Welcome,
Is the circle drawn on edge cuts layer?
Is the circle formed with the circle tool or the arc tool?

I changed your category in your title from Schematic to PCB

Now I solved the problem. it was Kicad’s program issue, not my design. In the design in trouble, I found one circle on edge cuts layer making the copper filled problem in isolated area. As soon as I eliminate it, the whole problem got fixed perfectly.

Thank you for your consideration!

You are not clear.
Does a circle was somewhere else or the circle we see was just made double.
If it was circle at circle than it was your design issue.