Playback for cresc/dim hairpins in a grand staff only works if the dynamic markings are anchored to the top staff
Using a grand staff, the playback for hairpins for crescendo/diminuendo only works if the dynamic markings (both the one at the start and the one at the end) are anchored to the top staff (right hand staff), regardless of the markings' property "Dynamic range" setting.
This at least in Beta 2.0 a925ae0.
When trying to place a dynamic mark in the middle of the grand staff, most of the time it anchors itself to the lower staff, which could be considered a minor bug, but it's not really a big deal because the property "Dynamic range" is by default se to "Part" and this affects the volume of both staves. However, the crescendo/diminuendo playback doesn't work correctly when this happens, and this is a bug.
UPDATE with image showing details: