Premiere Pro CC audio corruption issues

Hello Adobe community,
I've been editing happily on Adobe for several years now, and I'm not sure if it's CC, Mavericks updating and/or getting a brand new top-of-the-line 16GB/ram MacBook Pro to edit on, but every time I close and re-open premiere pro CC, the majority of my audio simply disappears -- sometimes it does it in the middle of an edit. The clips are still there, but they no longer have waveforms and don't play back. Sometimes it's most audio clips, sometimes it's ALL audio clips. It's inexplicable. I don't have any plugins installed or effects, it seems arbitrary as to which clips drop out.
There is a temporary and EXTREMELY aggravating fix, which is to match-frame each corrupt audio and then manually re-insert every single corrupt audio clip.
However, once a project gets to a certain point (what point, I still have no idea), the audio is BEYOND saving. I can't match frame and hear anything. I also can't re-link the corrupt file to its original -- the audio will never come back. This is so frustrating I can't stand it. Entire projects have simply become corrupt and it's not even possible to open a back-up successfully (once the audio drops out on one version, it seems to exist across the board across prior versions). I never had any issues when I start and work on projects from my hefty iMac -- it seems to have something to do with being on a MacBook Pro. So when a project gets corrupted, I've even tried immediately opening a clean back up on my iMac, but the audio is STILL corrupted.
I have tried so many fixes for this I'm going insane. It seems to happen most when I'm running off of an external harddrive, though I've tested it with so many different brands, capacities and connections (thunderbolt to FW800 to USB3.0) -- it doesn't seem to make a difference. I've lowered my buffersize to the minimum, have tried mimimizing all of my tracks so no waveforms are visible, i've tried rendering everything, moving scratch disks, pre-transcoding all footage to Pro Res 422 with 48khz audio, everything. I've also filled out bug reports to adobe, which I have no idea if they're ever seen or not. I rely on Premiere for my livlihood and I'm so desperate I'm about to go back to FCP.
Does anyone have any clue what this could be or any way you might be able to help?
Any help would be greatly appreciated.
Matt

All my footage is ProRes 4444 shot on the Alexa. Audio was recorded separately on a mixer, I can't tell you the model for sure but it generates poly track wav files. The wav has 6 separate tracks - five of which are being used. I've got another project, same footage/camera, same mixer/audio files and I haven't had any problems. There aren't near as many edits in that project and only four of the six tracks on the wav were used. They're still there, just no audio.
I'm using a 10 TB lacie big disk via thunderbolt in raid 0. I've had no other issues with the device or either port.
When it fails to playback I get the following error on the events screen:
'A low-level exception occurred in; Adobe Player (Player)'
I also used pluraleyes 3 to sync the project. When it output the xml for premiere it gave me a window that said 'this contains 5.1 audio data and pluraleyes may not handle it properly'. I didn't, in the timeline all the audio tracks were the same, it was the master mix on 6 tracks - no iso's. The wav files in the project widow had the proper tracks when I viewed them in the source monitor. Because the duration of the audio tracks were the same - I cut the iso tracks into the sync sequence I got from pluraleyes and deleted the audio tracks that originally appeared in the sequence. I mention this because as I said, I have another project that I used the same workflow for and haven't had these issues - yet. I also didn't receive the 5.1 message when I came out of pluraleyes.
Initially when I was having playback issues (the audio waveforms vanishing has been constant), I converted the 44.1 mp3 music files to 48 wav's to match the audio from the mixer. This solved the problem temporarily but now I can't get the audio from the mixer and the music to play in the same timeline. The only way I get playback is to take out the music, strip all the effects from the mixer audio and not have more than two tracks of audio simultaneously on the timeline.
Thanks in advance for any help/advice.

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