Perhaps I’m missing something…
I noticed today that if I attach a L.H. playing technique to a note, and I cross staff with that note (say from lower staff to upper staff) , the L.H. playing technique stays on the original (e.g., lower) staff.
Strikes me it should move with the note.
At the moment, I see no way to make it move except by positioning it manually - which I assume would drift to being wrong if the distance between the staves changed.