Overcoming the classical latency bottleneck in Xanadu’s Aurora to suppress optical erosion and phase instability in spatiotemporal cluster states. In continuous-variable measurement-based quantum computing (CV-MBQC), the path to fault tolerance does not rely on scaling static physical qubits inside dilution refrigerators. Instead, it scales by entangling flying photons into high-dimensional spatiotemporal graph states. While this approach allows for room-temperature homodyne detection and leverages silicon photonics, it forces quantum hardware engineers to face a brutal classical control constraint: the propagation speed of the qubit.