Hairpins work on some instruments but not others

Hi all.

Have recently begun composing a new piece (pdf attached).

I've noticed the single note dynamics seem to have no effect on my piccolo and oboe tracks; though they work well on the clarinet and brass tracks.

The tremolo also fails on my piccolo track (in Bar 17), and the niente tipped hairpins don't appear to work correctly on any instrument.

Plus the maracas don't sound like they should.
(I'm interested to know which percussion instrument they're emulating, as it's actually perfect for this piece!)

I wonder if these are due to limitations of Muse Sounds?

Another issue I've noticed is audio juddering on the brass crescendo in Bar 28 (a real shame, as it sounds fantastic otherwise!)