Multiple Tracks turned white and no audio output

I was working on a project and rendered to a stereo mix. After saving and reopening project, not all, but multiple tracks turned a white color and there is no longer any output from the midi date. I tried disable and re enable, does nothing. The tracks are not frozen. Any idea of what is wrong or what key switch I might have hit that create this problem? I’m at a complete loss as to how to resolve. I’ve included a picture of what it looks like.

Click on them with the mute tool. It’s the the cross ‘X’ tool