I've been a proud user of Cura 15.x for years on my UM2 printer. I've recently switched to Cura 3 because of the slicer's better efficiency to handle smooth walls.
However, I've been having a fairly strange issue on some of my prints. At the end of the print, the extruder head stays in place and remains hot for hours instead of homing. The heatbed also stays in place without homing down. Consequently, the part is locally ruined since the head remains in contact with it.
I have to manually abort the print to "solve" the issue.
The problem appeared with 2 different gcodes, both of them relatively large (7h prints). It does not seem to appear on smaller, faster prints.