Content is Missing from Cook and indeterminism: StaticMeshComponents in Blueprints that copy data into themselves from StaticMesh have indeterminism due to StaticMesh not yet finished loading, postloading, or building

Content is Missing from Cook warnings are warnings reported at the end of cook phase of a project's data build. They report that data used by a cooked package will not be available at runtime. This might cause a fatal runtime error or it might be harmless, it depends on the object types using the data that is not available.

There are two types of Content is Missing from Cook warnings:
1. "the object was stripped out of the target package when saved"
2. "the target package was marked NeverCook or is not cookable for the target platform"

This JIRA is about the first type, and for a specific type of referenced object used in blueprints:

LogCook: Error: Content is missing from cook. Source package referenced an object in target package but the object was stripped out of the target package when saved.
	Source package: <LongPackageNameToSourcePackage>
	Target package: <LongPackageNameToTargetPackage>
	Referenced object: <LongPackageNameToTargetPackage>.<BlueprintClassName>_C.<ComponentName>_GEN_VARIABLE

Note the referenced object is a _GEN_VARIABLE object, which is category of objects that is created by the BlueprintCompiler.

This type of Content is Missing from Cook warning can occur when there is indetermism during the load or compilation of the target blueprint package.

This JIRA is about one cause of this indeterminism: StaticMeshComponents in a child blueprint that are identical to the StaticMeshComponent in their parent blueprint and should therefore be stripped from the package, but during load either the child StaticMeshComponent or parent StaticMeshComponent are not able to complete finish loading and they appear different so that we do not strip them.

Fix the occurrence of Content is Missing from Cook Warnings for this case, and also fix any related indeterminism in the packages of Blueprints containing StaticMeshComponents.

Not yet known