Trouble with Yeelight Remote

Sorry to create another thread on a common topic but I’ve tried everything on the other threads but have had no success. My scenario is that I have two rooms, each with two colour LED Yeelights. They’re working fine in the app but when I follow the instructions the orange light on the remote just flashes and the lights in the room never ‘breathe’. I’ve also tried unscrewing one of the bulbs so it’s only pairing with one bulb but that didn’t help.

Any ideas would be appreciated. Is there some way I can get them set up in the app?