All of Logic's Audio Files Functions are Unavailable on Certain Files

I need to use this viewer (don't know its name) to reverse audio files for my reverse reverb technique:

See how all the functions in the function viewer are available? Well they aren't for any files recorded to a track named 'Sung':

Every option here is greyed out, even if I move it to another channel. Is this happening because I have flex pitch enabled on those channels? I thought of that when I noticed "Time and Pitch Machine..." was also greyed out. I didn't think this would be an issue, though I'm sure there's a workaround. I don't have a specific deadline for this song.

Ideal solution: re-enabling the Functions that are unavailable in the second screenshot.

I will settle for a workaround if it works.

Help would be appreciated. Thanks.