@MVDM 

Here is workaround.

Configure Guest Network to run on 2.4GHz only and connect smart switch to Guest network SSID. 

For best performance, configure Main Network to run on 5GHz only, if you have good 5GHz coverage everywhere.

This is how I run my Deco mesh.

@Alexandre.  This is a great IDea, will definitely impliment it. Also whenever I switch of either 2.4 or 5Ghz on Main or Guest network, my disconnects and for  a long time it says internet not availabel on that network, My computer and other devices is abel connect however. Is this normal?