No, it was my tip to temporary disable (not possible for app-less zigbee devices) or even temporary delete zigbee devices, to see if Matter reliability improves.
You’ve got to start somewhere to troubleshoot.
(When you re-pair your zigbee devices afterwards, all flows and such will work again)
If that’s the case, the Multi-PAN Thread/Zigbee hardware most probably is not capable of handling (too many) Thread & zigbee devices next to eachother.
Multi-PAN seemed a nice invention one day, but it appeared to be a quite bad idea and it’s best to avoid using both Thread & zigbee with it.
Pick one, and use something else for Matter-over-Thread, or for zigbee (like zigbee2mqtt).
