Hi Martin and all 2gether.
First, I have not an idea to solve the problem,
but I confirm that is a problem for me too.
(And possible my answer brings back to a higher position here (:-))
By the way - I begun with Slic3r 2 years befor now. Switch between KISS - CURA and some others,
come back to Slic3r since there is a own preview in.
And at the moment that version 1.2.7 brings for me the best results ever.
(Self made ((rebulild a X;Y,Z milling maschine)) printer.)
The unneccessary moves (prior on the first layer) are from time to time so
time consuming that the start on the next rope miss the first 2 mm.
So the base for the print is not stable an the rest of the print is on that position not clean.
If Alessandro and the team can fix that, for me Slic3r ist the best free printing software ever.
Nice printing
JoRo (Germany; Kölle)