Zigbee becomes unknown and lights turn off due to switch turning off

Hi All, I have a weird thing happening. Using ZHA with a SkyConnect in multi protocol mode. Everything is up to date.

Last night the lights in the lounge and kitchen turned off at about 9:50pm, triggered by a zigbee wall button switching off… yet no one switched them off. I grabbed any related log files in the HA log here Hastebin - Just wondering if anyone had any smart ideas about what might be happening here? Screenshot of one of the switches:

I also had a look a the same time, all the zigbee entries became unavailable…

Just a polite bump here if anyone can assist. Thank you.