You must test if your AJA ac adaptor is dropping out the 12v in constant and normal way. You must check you current wall outlet too (with a tester). In add, maybe your sine wave is not working properly; test your Ki Pro on another source or in other building.
I'd have the same issue when I was plugged on a generator truck with a long extension. My diagnose was current tension loose. Since I work with batteries, the issue never come back.