I have this weird issue, where the filament is being pulled back for no apparent reason about half way in the feed tube upon print start.
Has anyone but me experience this and could someone think of a possible reason?
Never had this.
Have you tried with a different object? It might be a corrupted gcode file.
I experienced this yesterday when I was playing around with Simplify3D. I extruded filament manually, amongst other things, and then when I started a print it retracted (a lot) of filament.
In my case the solution was simple, extrude filament manually until it was at the hot end, restarted software and reset printer. Don’t know if you need to do both, but just in case…
Regards
Micke