Why does this black hole binary repeat the same radio heartbeat?

Astronomers monitoring the microquasar GRS 1915+105 detected a faint radio oscillation repeating every ~33 seconds during a 2025 flare, visible in both S- and X-band observations. The oscillation frequency was identical to one observed years earlier, suggesting it's an intrinsic property of the accretion-jet system rather than random noise. This recurring timescale may reveal how material spirals into the black hole.