When I enable Fast Roaming on the X60, my normal internet speeds go from 200Mbps to 45Mbps on both of our Samsung S20 phones. All of our other devices will still run at 200Mbps on the Ookla test (Iphone 10, old Samsung Tablet). As soon as I turn Fast Roaming off, the Ookla test on the Samsung S20's jumps to 200Mbps. 

Is this a firmware issue or a Samsung issue? 

Thanks,

Tom