The blueprints in our project are broken after updating to 5.5.
We have a system of blueprints for customizable actors with the parent including a basic cube in the Static Mesh component. Then we use this base blueprint to make child blueprints for several categories of actors.
After the update, the blueprint started to ignore any new mesh added to the Static Mesh component when creating a new actor and building the game (it works in editor). It either shows up completely blank or with the basic cube used in the parent blueprint (depends on whether or not we cleared the SM component in the blueprint for the category). Older blueprints created pre-update using the same method work fine.
The only way that seems to make it work is add another Static Mesh component to the component hierarchy.