Ah, I see. No idea then. Only thing I can recommend is a workaround, using different mixers with different tracks locked. The way I have done it in the past is;
mixer 1: flexible and syncs with project window
mixer 4: shows groups and outputs only (I watch this to verify routing)
mixer 3: VCA and groups for later stage mixing
mixer 2: no groups, outputs or VCA
And then for the above I have different things locked to suit the stage of workflow I’m in. So mixer 3 has VCAs and Groups locked on either side so they never move, but I’ll leave tracks available in case I need them.