That was the issue here! Thanks for letting us know!
Attached two images as it was PRIOR printing and WHILE printing. The PTFE tube was squeezed between hotend and stepper motor. So the hotted could not go back to its initial position… it “stopped” exactly the distance of the PTFE tube 
Something we need to fix here. As a short fix I tightened the clips and moved them so that the power cord to the extruder is “lifting” the PTFE tube at the end.
Long term solution is only a printed cable chain I guess (or buy it from Bambu Store) 
