I've stalled for no apparent reason before, Myles. Maybe you're not noticing how much more you're doing and you're swapping out fat for muscle? That's the last thing that stalled me. Maybe keep doing what you're doing and wait it out, since you already know it works.
If anything, cheat the other direction and take in less calories and see if it gets you bump-started again. You may have just changed your whole metabolism and your body doesn't know which way is up?
It's probably wondering who the hell you are and what they ddid with Myles.