I am attempting to print a file over usb using CURA. The printer connects just fine, and the jog controls all work as expected. However, after the pre print extrusion happens, and the print head moves to the location on the platform where the print should begin, it moves in jolts, extremely slowly, maybe 1/100th of the speed of a normal print. The very same sliced file printed via sd card works just fine. Any idea what the issue may be?