The cutting line cannot overlap again

I am cutting the end caps of some aluminum cans using the latest version of LB software (2.0.04) and my rotary chuck. All components are horizontal, tangential, vertical, etc. - I have checked repeatedly because on my first attempt, I found that after rotating the chuck once, the cutting lines did not coincide again.
This left me puzzled, so I tried to carve a 3mm rectangle on the circumference, and everything was perfectly aligned. I found that the only way to obtain a clean and sharp cut is to carve a very small rectangle, only 0.100 millimeters, so that everything aligns after cutting and the effect meets expectations.
I want to know if this is a software error with the line tool, or if there is anything missing in my settings.