I was still doing some trials with Path workbench, but I had some issues with the display of the parts.
When I create a Job, and I have opend the "Job edit" menu, is not possible to refresh the view.
If I try to move and/or rotate the part, everything disappears and I have to close and reload the file in order to see my model another time.
This problem is always present and I can easily repeat it.
I have supposed that this bug could be related to drivers or graphic issue, therefore I've opened "Preferences->Display" and I have seen the option "Use OpenGL Vertex Buffer Object".
With this option active, I don't have anymore any issue.
Somebody can explain to me why?
PS: The behaviour described at the beginning should be reported as bug?
PPS: This is my configuration
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.16131 (Git)
Build type: Release
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Italian/Italy (it_IT)