its tricky because it might not actually be the wifi that is tweaking out with koen. From what I understand, he is getting the audio stream via Wifi to his iDevice and then out via Bluetooth to the headset. Without the headphones, I did not get a specific feel from his posts, if the dropouts kept happening or the issue was IOS putting the Roon app to sleep. Bluetooth can also be very touchy about interference and movement.
I would suggest, that he test the various locations with only the ipad and its speakers, or plugged in external speakers. If that goes , well, then add the the headphones back in. I tend to shy away from using bluetooth near the kitchen as I’ve had the microwave cause dropouts and playback issues with Bluetooth.