2 year old installation, with over 80 devices.

Recently (last month or so) more and more of the plugs are moving to 'local only' control, and not moving out of it.

Not sure why.

There is a mix of KP115's, KP105's, HS110's and various bulbs. About 15 are local control only now.

They have automatic firmware updates disabled as (being in the UK) newer firmware removes local control in some cases. There is no correlation by model number (e.g. it's not all the KP115's) and the devices are all on the same firmware by model.

I have full control of the network and access points, including routing. There are no firmware changes on any part of the network internally.

I can't see any networking 'barriers' between the local only plugs and the gateway. Power cycling doesn't change anything. I'm loathe to try removing and re-adding just now as some of these devices will require a cherry picker hiring to reach them again.

Any thoughts?