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There could be several reasons why the state isn't being received in BlocBuilder when you emit it through BlocProvider, including:

1. The BlocProvider and BlocBuilder are not properly connected: Ensure that you are properly connecting the BlocProvider and BlocBuilder widgets by wrapping the widget tree with BlocProvider and using BlocBuilder within it.

2. The state you're emitting is not being monitored: Ensure that the state you're emitting is being monitored by BlocBuilder. For example, if your Bloc has multiple states, make sure that the state you're emitting is being monitored by the BlocBuilder using the 'builder' property.

3. The state change is not being captured: Ensure that the state change is being captured by the Bloc. For example, if you're using the Equatable package to compare states, ensure that the states you're comparing implement the Equatable interface.

4. The state is being emitted multiple times: Ensure that the state is not being emitted multiple times, as this could cause unexpected behavior. Use the 'distinct' property to ensure that only distinct states are emitted.

Overall, it's important to ensure that you are following best practices when using BlocProvider and BlocBuilder, and that you are properly connecting your widgets and monitoring the state changes that you are emitting.