I have just recently updated my ArchiCAD 20 to the 6005 build update and I have found that when using the marquee tool to show selection in 3d, all the morphs disappear. Though I can view morph boxes or morph objects revolved, just no non-solid morph 'planes'.They are still there in 2d but are not visible in 3d.
If I view in 3d with 'show all' (same layer settings) they re-appear.
if I view in 3d with 'show all' in 3d and use the 3D cutaway tool they appear as well. (again, same layer settings)
Does anyone know what could be causing this? A bug? Some new default setting I'm not aware of?