Long time no see. Have not played for a looong time and just tried out the Beta but only very short though since it is more or less unplayable for me at the time (and I guess all other invert-mouse players, if they still exist).
Invert mouse is bugged. While the ship do respond correctly, the actual UI does not. The small circle following the mouse movement is not inverted.
In free look invert mouse is neglected all together.
Sadly this makes it more or less unplayable for me at the moment. Will come back with more feedback once this is fixed.