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I also had this problem sometimes in the past. Not sure it's related specifically with the Saintflint technical solution, but you can probably get rid of it by including a small retraction at the end of your print. Something like this should the trick:

"G1 Z10 E-3 F3000 ; move extruder up 10 mm and retract filament 3 mm"

Glad you're enjoying the solution... ;)