When I started using Fusion 360 in 2017 I remembered having stumbled upon this same problem with copying sketches. Sometimes sketches copied upside down on to a new sketch plane. With this thread I was able to realize there's some bug with copying to the XZ plane with Z axis up.
So I'm having the same problem again today as I picked up doing some more mechanic design work, only to discover that the problem has NEVER been addressed, and that was 4 years ago. What's going on?
My oldest son just started high school and they were initially going to train using Fusion 360 but the teacher changed over to SolidWorks instead. The understanding was that "Fusion is buggy" according to his instructor. Well, an example like this certainly proves their point. This is a basic flaw - why hasn't this been fixed yet?
By the way, the workaround doesn't work very well when copying sketches to different components. We don't need a workaround, we need a solution.