An update on my situation. It turns out that user misunderstanding (mine) of how the AJA Adobe plug in works vs. the Mercury Transmit interface was causing my RAM preview issues. Got that sorted. But I still wonder if my misuse of the system was causing some type of memory leak (pour more likely!!).
I will give things a try now that I understand the rules of the game and see if the error pops up again in the 13.1.0.111 release.
Jef