Hello, I was experiencing this same problem with my CMF buds pro, one of the buds stopped working so I forgot the connection on my phone to try and fix it. Only to not be able to pair again because of the red light appearing instead of the flashing white.
I’m unsure if this is a complete coincidence but I went on my laptop which I’d used with the buds before and noticed when I had opened my CMF buds case they’d automatically connect to the laptop, I disconnected my buds from the laptop’s Bluetooth and then I tried pairing again only to notice that the flashing white had returned and I could pair them to my phone again with both buds working on my phone again.
Strange fix but give it a shot, I hope it helps you too.