UNEXPECTED BEHAVIOR ON SCALE COMPONENT

Hi,

I am trying to unrolling 2crv lofted developable surfaces using unfold component ( from toolbox )  and unroll component  ( from Fab tools ). 

PROBLEM : Both components work fine with original surfaces but here is the problem : When i try to unroll a 3D scaled copy of the same surfaces ( using "Scale" component on GH Transform Tab )  I have unexpected results --> some unrolled surface just start to show wrong results with "jagged" edges , some of these surfaces are totally messed . ( BTW the scale factor is never greater than 10 ).

IMPORTANT :  if i try to unroll the same scaled surfaces using Rhino  "_UnrollSrf" command i don't have any problem

Does it depend on the absolute tollerance ( I am actually working in [mm] and the absolute tolerance is set to 0.001   )

One of the solution I have found is to scale after unrolling but this will force me to correct several parts of my script, can i somehow fix it just by acting on GH or Rh setup ? Is this a bug ?

cheers

Ivan