Instanced property does not propagate changes to child BP instances.

i have create some instanced properties like below

UPROPERTY(EditAnywhere, BlueprintReadWrite, Instanced, Category = Box, meta = (AllowPrivateAccess = "true"))
	TArray<TObjectPtr<UX2FunctionWrapper_BoxOpened>> OpenedFunctions;

which is Instanced as it is.

i have create 2 BP, one is BP_Box as the root and the other one is BP_Chest.

after i changed the OpenedFunctions in the BP_Box, like add or remove some Instances, this change won’t propagate to BP_Chest, i have to do it manually.

since there are so many instances out there, this Un-propagation behavior are causing more and more troubles.

can i do sth to let the changes propagated automatically through the parent-child chain? like if i do sth on the parent, it will be propagated to all the children?

thank u very much.