Near Disaster

Oh! Near disaster!

Hi folks! I printed a vase model of 240mm height and surprisingly when the print head was missing a few mm to finish the print it started scratching on the surface of the last layers… Strange behavior given that I was well 10mm below the safety threshold of the printer for high scrolls [normally 250mm]… Has anyone ever experienced this problem. Why did this problem occur in your opinion and above all is there a way to prevent it from happening again? Oh! I forgot the slicer Orcaslicer