Glad to see that I am not the only one! I totally agree that it is an easy bug to work around, I just wanted to make sure that it was noticed so that it could get fixed in the next round of updates, as no one likes that click click click sound of steppers skipping.
I have found a reproducible bug in the UM^2 firmware. After you abort a print, while the build platform is still lowering, quickly go Back to Main Menu -> Maintenance -> Advanced -> Move Material. The buildplate will begin to rise, and will not stop even after crashing into the nozzle. I am running the latest firmware released with Cura 13.12 Here is a youtube video I uploaded of me reproducing the bug. Anyone else able to reproduce this?