Some issues with the Smartenit 3 toggle switch ZBWS3B

Hi, a few months back, I purchased a Smartenit ZBWS3B 3 toggle switch, and installed it to my SmartThings home with the great tutorial by @JDRoberts from this thread:

Battery Operated 3 Toggle Switch for wallmount or table top use (SmartenIT ZBWS3B), Long Install FAQ

In the last month or so, however, I’ve noticed my Smartenit switch would sometimes stop working for no reason. And when I press the buttons, sometimes, the LED flashes 5 times, but wouldn’t work. Other times, I have to press it multiple times before the button presses register. Sometimes, pressing the button will not trigger an action until 5-10 seconds later. Sometimes, it would just not work at all, and I would have to remove the device and re-add to get it to work again and even then, it’s intermittently failing. I also tried removing it from the walls and bringing it closer to the SmartThings hub, in case it’s because there’s some sort of problem with the zigbee connection. Sometimes that works, sometimes it doesn’t. Usually, if we don’t do anything to it for a day or overnight, it’ll start working again by itself.

Anyone else having an issue with this or am I the only one? It was so great for the first few months, but now it’s intermittently not working. It seems to especially prone to failure at night. Anyone have any suggestions or fixes?

Bump, in case anyone else has experience this issue.