ZORZA 2Pcs UBEC 5V 5A External BEC Voltage Regulator Antijamming Switching Regulator for RC Servos 5V 2-7S Step Down UBEC Module Ideal for FPV Quadcopter Airplane

https://www.amazon.com/dp/B0CQ1R55BV?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1 I’m already using a 5V 5A UBEC from a 4S LiPo battery, but the Pi + RealSense is still unstable. Many people suggested 5A, so I’m wondering if the real problem could be voltage drop, noise, wiring, or the UBEC not actually providing stable 5V under load.