If your device charges, then stops, then starts again on the 165W USB-C 4-Port PD GaN Charger, try these steps:

• Try a different USB-C cable — a loose or worn connector is the most common cause of intermittent charging.
• Clean the USB-C port on both the charger and your device with a quick burst of compressed air.
• Connect just one device to rule out power re-negotiation from sharing across the ports.
• Try a different wall outlet, since unstable power can make the charger reset.
• If it only happens when the charger is hot, let it cool and try again.

If the problem continues with a known-good cable, submit a support request.