Character Disappearing In-Dungeon

Hello. I just wanted to share a bug that cropped up when I was in a dungeon run in Tam Tara earlier today. I was a THM with some healing skills, so I was covering healing at first since we didn't have a CNJ. After a couple battles, I'm not sure what happened, but I could no longer see our MRD in the room. She showed up on the mini-map, but when I tried to select her, the character and enemy targetting pointed outside the room we were in. To the others, she was clearly visible. She was supposedly right in front of me, but the game was telling me she was out of sight. Eventually she became untargetable completely (using a PS3 gamepad, when pressing down, it would skip past her to the next party member). Luckily we also has an ACN who was able to heal her, so we were able to successfully complete the dungeon, but still not sure what was going on. Just thought I'd share this info if it could help Square with the Instance troubles. My character is Lunik Soleria on Migardsormr.