Apple's article mentions USB 3 devices, but the issue is very much with Mac Mini's ports. Moving the devices further away doesn't help much.
I have a pair of cheap Bluetooth earbuds. They have a range of about 30 feet with when paired with an iPhone and about 4 feet when paired with the Mini. Apple's Magic Mouse needs to be within about 4 feet to work as well.
https://forums.macrumors.com/threads/usb-3-causing-interfere...
Apple's article mentions USB 3 devices, but the issue is very much with Mac Mini's ports. Moving the devices further away doesn't help much.
I have a pair of cheap Bluetooth earbuds. They have a range of about 30 feet with when paired with an iPhone and about 4 feet when paired with the Mini. Apple's Magic Mouse needs to be within about 4 feet to work as well.