Change USB Ports for Tuning Adapter?

I have a Roamio Plus with two Minis on Charter Cable with a Cisco Tuning Adapter. On 3-4 occasions, I have lost a few digital channels, sometimes more than others. The first time this happened, I gritted my teeth and called Charter support. After taking me through several things, the support person suggested rebooting the TA and changing it to a different USB port on the Tivo. This did the trick. After that, this is the procedure I have used when I notice untunable digital channels. This is not a big deal, and in the larger scheme of things, just an annoyance, but I was wondering if there was anything else that could be done to prevent this occurrence?