Very strange : the battery level I get from ZHA shows me 100% and after testing those batteries this is correct (1.5 V). Still I replaced them with other ones and…it works ?!
Maybe it was enough to set the device for a moment out of power and just replace the same batteries…
Look as soon as your battery powered devices are began acting weird it’s usually low batteries. You can heat nearly drained battery in your hand, put it back in device and it will work. But it wont work very long.