Funny story found the post, and you were speaking with Markus, what's a matter you can't remember all the 9000 posts you made 
I'm not sure if Mike fixed it?
markusOwner
Sorry, this needs to be clarified, it is one of MY devices sending the incorrect Beacon packet, so far always one of the Xiaomi/Aqara sensors or buttons. It has been all different types of them doing this. In general they all get it right, but among all those 80000 beacon packets, one get to be wrong. This 1 incorrect packet is then interpreted by HE as a reason to change the PAN ID, which then starts the whole issue. However, the reason for all of these beacon packets to be sent, is because of how the controllers around me behave, that is a bit more of a complex issue, but suffice to say that it is according to specs.
You and me both, it is such an unnecessary reason to bring down the whole mesh.
