@MrNiceMesh My post from a week ago eludes to some sort of issue with the M4 V2 firmware update. Browsing the forums, there are some issues reported with the 1.5 firmware. My best guess is they have withdrawn it, annoyingly after I'd updated 1 node.

The response on the issue from TP-Link seems to be non-existent. My best guess is that they will release v1.6 firmware across the board.

It's really frustrating that the firmware support is seemingly haphazard, I'm guessing they may have bitten off more than they can chew with allow 'mixed' nodes types in a Deco network, it must make firmware release and testing much harder.

To be honest, my patience is wearing thin, with this and other issues. A well-known Taiwanese firm (4 letters beginning with A), seems to have a far better grip of firmware for its products, releasing firmware still for decade-old routers, and adding mesh functionality to them. It seems that the cheap upfront cost of Tplink is a false economy.

@MrNiceMesh I've found a TPLink reply on this thread, it would be good to see something on the firmware update page, where people are looking for firmware.

@Walrus thanks for the info. That clarifies.. We will have to be patient than...