problem with the finish pass in pocket when milling a b-spline or ellipse

[eddyverl]

And here some testing material in all sizes an difficulties.

you can download them here

Tested with:

OS: Linux Mint 19 (X-Cinnamon/cinnamon)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.19438 (Git)
Build type: Unknown
Branch: master
Hash: fa635035dd6a9dc3a327bd68c5f0763e2c8509b1
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Dutch/Belgium (nl_BE)