Delayed audio playback in canvas - ProRes 5D clip

I have some 5D clips (30fps) which I transcoded into ProRes 422 in Compressor, at 48kHz. I dropped them into a ProRes 422 30fps 48kHz timeline in FCP. Upon playback, each clip has no sound for the first few seconds. The bars in the timeline are gray, so it "should" play back fine.

Mine has Firewire DV checked, but grayed out. What should it be?
At full realization that I'm going to look like an idiot, I just tried rebooting the computer and the playback is now fine. I had already checked the activity monitor to make sure I had enough RAM available, and tried restarting FCP. As I bang my head on the desk, I ask why I didn't try rebooting first. Thanks for your help.

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    <moved from downloading, installing, setting up forum by mod- kglad>
    Message was edited by: kglad

    First of all, thank you for replying my message!
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