thanks and sorry!
my post was missing all the info.
it happened yesterday for the first time. robofont crashed when i wanted to save a ufo.
at the moment of the crash there also was a script open in the drawbot extension.
and when I reopened robofont it also opened the script but in the robofont editor.
guess that caused the confusion.
its seems to be a fontTools issue
it seems to recalculate the bounds from all points instead of analysing the bounds of the contour
(this will be fixed in the next version...
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