Gaps in Waveforms?

So im in the depths of a project, and i noticed that there is now gaps in the waveforms on my multi cam clips...and actually all clips. There is definitely still audio in those "gaps" or blank spots, but its not showing as a wave form in a clip.

I tried deleting render files...no go. Any idea what the problem is?

You can see an example right to the right of the yellow selection area in this attached picture.

I'm getting those on occasion as well. They seem to come and go at different zoom levels...