If I switch the primary display (i.e. after plugging my laptop into a larger HDMI display), plank correctly moves to the new primary display. However, the PressureReveal edge is still present on the old display and not on the new primary display.
[PlankDockPreferences]
CurrentWorkspaceOnly=false
IconSize=48
HideMode=3
UnhideDelay=0
Monitor=-1
DockItems=pantheon-files.dockitem;;google-chrome.dockitem;;midori.dockitem;;geary.dockitem;;empathy.dockitem;;maya-calendar.dockitem;;chrome-jeogkiiogjbmhklcnbgkdcjoioegiknm-Default.dockitem;;noise.dockitem;;audience.dockitem;;shotwell.dockitem;;scratch-text-editor-1.dockitem;;pantheon-terminal.dockitem;;switchboard.dockitem
Position=3
Offset=0
Theme=Transparent
Alignment=0
ItemsAlignment=3
LockItems=false
PressureReveal=true
Restarting Plank updates the PressureReveal edge, but it should definitely update when Plank moves. :)