CNC Machine machining parts that are located in the corners of a sheet incorrectly

Good Day Everyone.

My Blue Elephant ELECNC-1530ATC Machine is machining parts that are located in the corners of a sheet incorrectly. When I simulate the problematic codes on an online NC viewer and also in the software that I use, Cabinet Pro, the machining comes out perfectly, but when it gets to the machine via a thumb drive the machining on the parts close to the corners of the sheet gets thrown off randomly. It was working before but then started to give this error recently.

See an attached example.