RBR350 - sometimes Samsung phone won't connect to main network

Hi Guys,

Have the Orbi system set up with 2 satellites.

Have a Samsung Fold 4 smart phone.

At times (like now) the phone cannot connect to the main wifi network, but will connect to the guest network. I click on main network and sits there saying connecting ....

Have tried rebooting everything, ensuring all devices have latest firmware, delete network from phone, etc

When I connect via guest network, load orbit app, look at devices, I can see my phone in the guest network, but listed under 'unknown connection'.. that is, orbit can't tell if connected by 2.4g or 5g!!

Then at some random time, I will be able to connect to the main network, and everything will be fine for weeks.