Have a problem with packet loss from my MacBook Air M4 to Deco BE68.

I've got two Deco BE68 units one downstairs living room at the front of the house connected to my ONT seconds upstairs in read office\bedroom. Deco units are connected via Ethernet backhall 10G (house is wired with Cat6 from office to living room).

Networks configured are:

IOT - 2.4Ghz

Primary network - 2.4Ghz, 5Ghz, 6Ghz

Second Network - MLO only 5Ghz and 6Ghz

I've multiple devices in my house, Asus PC's, MacBook Pro M1, iPhone 17 pros etc and they all connect to either the Primary or Secondary network fine with no issue, not packet loss. Speed tests show 500Mb (max internet speed) on speeds tests.

Just my Mac Book Air drops packets no matter which AP its connected to or which network its connected to.

I've tried an unsecured guest network, connecting to the IOT 2.4Ghz network, turning off Mac Privacy mode, disabling QoS, Enabled and Disabled Fast Roaming just still getting this problem.

Mac works fine on other Wifi networks (at my companies office, Tethered etc).

I've upgraded Deco's to most recent firmeware on the support pages and then on the automated update online option from the Deco App.

Any ideas as just struggling to work out what the problem is.