Score Editor: Copying notes from a piano bass clef staff to a single staff doesn't work.

Score Editor: Copying notes from piano bass clef staff to a single staff doesn’t work.

I figured it out. Notes from the piano bass cleff are assigned to voice 5 and 6 and my single staves are optimized only for two voices (1 and 2). My workaround is to imediately change the voice after pasting.