Continuing the discussion from [Release] Xiaomi / Aqara ZigBee device drivers:
These don't drop more than any other Xiaomi/Aqara devices, but without knowing what you have in your mesh as repeaters, it would be hard to say anything. With that said, I've not had the one WXKG01LM button I have drop, ever. And that is on my dev mesh which is not always very stable due to constant changes.
If you could describe your mesh a bit maybe there are things that can be identified as possible issues. What repeating devices do you have, how many and model? How many endpoint devices (doesn't matter model at this point, just the number of devices)? Size of the area covered? Multiple floors? Hub placement relative to everything else, which repeating device is closest to the hub? How does your routing look like?