Weird placement of dynamics

I’m trying to understand why in bar 90 the ff is placed above the staves, pushing chord symbols, instrument names and rehearsal marks even further away from the top staff.

In bars 88 and 92 they are below the staves as expected, and for all dynamics shown the Placement properties in the Dynamics panel are unset (so default applies). I know I can use that property to force it to appear below the staff (and I will do that as a workaround) but I don’t see why Dorico makes a different choice in the first place.

OK I understand: it’s because these are condensed staves, and in bars 88 and 92 it’s the instrument on the bottom that has dynamics while in bar 90 it’s the top instrument.