Engraving edges too deep

Helo, I have new laser, 40w with ruida controller.
When I engrave something, edges of engraving are deeper than rest.
Tried also lightburn software, slowed down acceleration, tried many speed/power combinations but no luck.
Alignment is perfect.
Check photo please.
Any advice?

Try engraving it with plastic, wood in many cases it has a softer and harder part, you can also try engraving it on a hardwood :)

Tried also different wood, plastic and leather. Its same result.
Looks like tube first fire is stronger..