Nozzle blocks retraction
I have an MK3S with a E3D hardened steel nozzle.
It seems my Nozzle is a few mm too low and blocking the retraction mechanism.
You can see from this photo the crease in the foil - this is the ridge that is catching on the nozzle:
Here is a video of a manual x axis jog. You can see the pinda catching, the assertion/retraction arm getting nudged by it downward then the nozzle catches and eventually pushes against the mechanisms assertion from the other direction.
Tried both 2 and 3 springs, on single spring during the video. Pushing the retraction mech as the extruder body would manually - seems healthy.