In my project, I have a dynamic material instance set up to change the colour of a laser sight when locking onto a target. Weirdly enough, it works perfectly when I launch the game as Standalone Game, but in any other way (including when the game is packaged), the particle doesn’t change colour.
When run as standalone game:
When run from packaged executable:
Construction script where the dynamic material instance is defined:
Event graph where the colour parameter is changed: