Is "planar" snap buggy in rhino6?

Hi, in rhino 5 I had no problems using the “planar” constrain when moving objects around, for example moving some lines in a plan view with a reference in another Z without moving their elevation. In rhino 6 it seems not working, example: in Top view I want to move some objects at z=6m perpendicular to a line drawn at Z=0, but keeping the original Z=6. Both with “planar” switched on or off I end up with my objects to Z=0. This is not what I expect (while it was what I had in Rhino5).
Any help? thank you.

I think you will need to combine Planar and Project to get what you want - in both V5 and V6 IIRC…

thank you