Despite rumors to the contrary, I am human and therefore do require help once in a while.:)

Here's an idea:

What if it only happens on Mk2a players (not Mk2), and only if Consumer (not Developer)? There's one thing that those datapoints have in common: Memory footprint. The 2a's have a larger memory size than the 2's, and Consumer uses more memory for cache than Developer. Perhaps there's something about the cache code that fails intermittently with that particular combination?