This just happened to me, same mistake trying to clear tape but activated and got stuck in Izzy, at the same place “hold down and press play” the audio after just loops forever, and I can only stop the tape and put the instruction sample back in forward motion. Hope I get out soon, and Beta 12 was going so well 
EDIT: Desperately flicking and hitting loop I got it to move through the uneffected dialogue recordings. Suddenly in the middle of the instructions there was audio pieces I recorded months ago and long deleted, dubbed over izzy. it got to the end where it says GAME OVER, and when I hit play, it took me back to the glitched part of Izzy. Still stuck.