When i copy and paste a shape, it is pasted with rotation.
I manually rotate shape or change rotation angle to 0 to make it parallel with to axis.
What could be reason and how can i fix it?
Can you check if your artboard is not rotated?
How can I check? (I'm very new to Illustrator)
In the lower left corner of the document window.
I found solution. It is about constrain angle. (edit -> preferences -> general)
Good to hear you found the solution (I should have thought of that).