Another thing to look at is whether you have loaded the canvas with the cutter off on the printers front panel. I tend to load all rolls of media, canvas or otherwise with the cutter turned on and choose within the driver to cut or not.
If you are choosing Canvas as you media type within the driver, it will automatically disable the cutter.
The media advancement will always happen if you load rolls, any media, with the cutter turned off from the printers front panel. Also if the the roll is loaded with the cutter turned off and you select to cut within the driver, the printer will not cut. It will just advance the media forward, as if to cut then back to where it finished.
Hope this helps.