UPDATE: Problem Solved! Turns out that the problem was a "Grounding" issue. ALL power needs to be plugged in to the "same" power source. For Instance I have 2 standard battery backup power units. I had things just randomly plugged in to both power sources as I have an abundance of plugs that need power.This was never a problem. UNTIL I added (Powered) JBL Studio Monitors into my environment, that's when this annoying distorted whining sound started presenting itself randomly. Once I plugged ALL devices into the same power strip WhaaaaaLaaaaa Problem SOLVED. 3 months to figure that out. But so happy because once again my UX2 is flawless and kickin lolipops again. Thank you to line 6 support for troubleshooting this and suggesting I switch all my speakers/UX2/Computer and Monitors ALL be on 1 power source.
Hope this helps someone else! Cheers