After setting up the BigBox to do dual print. I thought I had a horrible alignment issue or something else wrong when my print head was bashing into the print. This would happened at seemingly random Layer heights. I gave up and went back to single nozzle. I removed the left nozzle and still had this issue during layer 15 of a print. I rebooted everything and tried again after checking z frame movement and the print competed successfully. Last night this happened again, This time on about layer 80. I was reading another thread and saw Greg mention something about bad gcode causing the print head to crash against prints. Is this happening with new version of Octoprint sending wrong gcode to the printer? Is anyone else experiencing this?