Hi. Potential Mac Mini buyer and I have recently seen a number of posts and videos about the issue of usb interference with the 2018 mac mini. This interference degrades wifi and radio mouse performance. Some posters had straight swaps of the 2018 mini and 2014 mini but were now getting usb interference. Usb interference was identified by doing a-b comparisons of wifi and radio mouse issues with usb devices and docks plugged and unplugged. Has anyone experienced this issue? Any solutions?