It seems so, but in an unexpected way, on my end. Context : edition of few MIDI CC7 nodes in the key editor.
I have set the Drag&Drop category like this :
… and the Size Objects one as :
Result :
Using these on MIDI CC7 nodes, I get a direction constraint, using the ctrl key, as expected. OTOH, the snapping is not disabled when using the shift one, BUT… Using both the ctrl+shift together does work : I’m able to position a node precisely at a given place, no matter the quantize setting … 