Purchased a hub and 3 buttons a few years ago. My first experience wasn't great, so kind of let them lie until now. Thought I'd try to incorporate them in my Homekit setup again.

Seemed promising at first. The button would turn the lamps on as they're supposed to. Next day. Buttons display red lights. Next day they work again. Today they don't.

Hub is up to date and connected via ethernet. Since that wasn't working, tried connecting via Wifi. Still the same problems. I don't why this is so hard. It almost seems like I don't have the same product I read about on the Flic web page.

What is the most likely cause of this? I really need something that works reliably.

Thanks.