I've seen a few similar post and now here's mine. I installed three of the lutron maestro fan and light switch with IR a few years ago and they've been working fine until the last few months.
They both seem to have trouble communicating to the ceiling fans/ lights. I've tried pulling the tab on the front of the switches and leaving them off for a while and even overnight and sometimes they're fine other times they get stuck on or off.
Sometimes I will get the error pattern in the LEDs where the light section of LEDs is cycling and the fan section will have the second light from the bottom on I believe. Showing there is a communication issue. I've tried cutting power to everything else in the house and have no idea if there's something actually interfering or if they're all slowly dying about at the same time.
Is it RF from the switch to the control module in the ceiling fan? It's a small house and they're very close maybe 10 ft. Every year there's more and more Wi-Fi stuff in the neighborhood but I hope it's not on a frequency that would matter.
It's too bad because they were very expensive and I really liked the way they worked with my universal remote and now you can't get them anymore.