(Bug) Isocurves not showing (but influence selection)

Isocurves are not shown for planar faces regardless of the preferences / options

and what is annoying - invisible Isocurves influence selection as reported here:

Version 8 BETA (8.0.23290.13304, 2023-10-17)
Expires December 1, 2023

mac os x 13.5.1 (22G90)

Currently away from Rhino. My recollection is no isocurves on planar surfaces is a new feature in V8, but there is a way to override it and display the isocurves.

yes it s in the preferences - displaymodes - Objects - Surface Isocurve setting - - shown in the screenshot in post above.

Hi Tom -

Thanks! → RH-77820 Display Metal: Isocurves on planar surfaces
-wim