I'll try to keep this brief, but backstory is necessary.
Original Nexus 4 came in, bluetooth often would refuse to connect to paired devices without rebooting the phone (or power-cycling the other device oddly). This was on stock. Flashed AOKP milestone 2 at some point and problem persisted.
Original Nexus 4 data port broke, RMAed and got a new one (now with nipples!). Flashed the same AOKP milestone and whoa, bluetooth works wonderfully now. Always connects immediately, amazing!
Fast forward to yesterday, I flash the new AOKP 4.3 build along with a new radio at a knowledgable user's suggestions (filename radio-mako-m9615a-cefwmazm-2.0.1700.84.zip). I'm right back to where I started with bluetooth refusing to connect half the time. Now I KNOW it's not a hardware issue because it worked on this new Nexus until yesterday.
Is this a kernel issue or could it be the radio? Recommendations on what to flash to get my bluetooth working again?