I plug in my phone to charge and 1. sometimes it recognizes it immediately, starts wireless fast charging, but after a few minutes the indicator light starts flashing and it stops charging. 2. sometimes it doesn't recognize my phone and I have to unplug the charger from the socket and plug it back in. Sometimes I have to do this 4-5 times for it to start charging. 3. sometimes, even without the phone on it, it starts flashing and doesn't work.
I have tried four chargers + plugging it into a laptop USB, always the same behavior.
It does the same thing with both pads.
I have a Samsung Galaxy S20 and a Xiaomi Mi9, same behavior.
I have a Xiaomi wireless charger pad, two and a half years old, and it always works consistently.
This specific charger is basically useless, you can't rely on it to charge your phone.