I've used Vegas Movie Studio 16 Steam Edition for about 3-4 years now and no problems but when I started to use power user mode my text began to go invisible once I closed the application and re-opened it and now I cannot see any text what so ever. Please help this is weird. And incase you need to know what device I'm using its a HP laptop.
Okay, I don't know exactly what I did but I clicked on this little "S" icon with a "!" next to it and it fixed it so.... yeah.... Nevermind I figured it out I guess.
My guess is that you have that track "muted" and by pressing "S", you now have that track "solo'd". You might try turning off mute and solo for all tracks.