Found a glitch where for whatever reason it causes you to be unable to switch PDA modes (I have no idea how to replicate this glitch, but I feel like it has something to do with purchasing the blacklight)
Update: Apparently it has nothing to do with the blacklight at all as on my new save, the same glitch happened, but I didn't have the blacklight purchased (It didn't happen right away after the save file was made, it happened after opening the game about a day later)