So I played Guitar Hero World Tour just fine without any issues and moved onto playing GH III after, but notes keep vanishing or turning into solid black objects. Not sure what to do, I attempted to turn off "store EFB textures to storage only" without any impact on the issue. I attached a link to a quick video showing some of my issues. At the beginning you can see a huge black block with lines that goes away after a while, and then at 1:47 you can see the green note isn't there, but the fret trail is still visible: The opposite can happen where the note is only visible and the fret trail is gone. At 2:20 an entire string of yellow notes is gone until I play them. In some increments in the video, you can see that I can actually play these "invisible" notes, and at others, you can notice the flame texture that usually goes off when a note is played isn't there. I'm not entirely sure what's going on, but I do have all the recommended settings checked.
https://youtu.be/TUizVFumkkY
https://youtu.be/TUizVFumkkY