I changed from Z2M to ZHA when i bought the skyconnect dongle, had an idea to try som matter devices.
With Z2M i had so much trouble with Aqara, as soon as a device shut off that an aqara was connected to i had to re-pair it, very annoying.
So i thought ZHA should work better, but instead i have trouble with Hue-battery devices as explained above by Nobber, have not had a single trouble with Hue before changing to ZHA 
and now aqara seems to work fine instead.
I am currently on channel 20, but could try 25 to see if that solves it. But there will be allot of re-pairing, i am currently at 117 devices in my zigbee network with majority being router devices.
wifi at channel 1 so there should not be problems there.
Just wanted to check if someone thinks it is worth changing from channel 20 to 25, or go back to Z2M?
I have trouble with all 002 and half of my 001 devices it seems at the moment.