Maybe already reported, can't find it.
1. Create A3 document.
2. Print on A4 paper with Fit Type "Shrink to Printable".
3. Add "Include crop marks".
Result: The preview indicates, that the crop marks are outside the paper and they are indeed not on the paper when printed. If something does not fit to a paper this will be normally shown with a red area. Printer was Color Laserjet M751. See attached image.