I don't know if it's exactly a bug, but it's super simple to fix. I noticed that both the rooms with the moma rena and the rubber rena, after they enter the digivice, don't have a teleport to the exit. If I want to enter and exit the room, I need to enter normally and teleport out with the digivice because the door doesn't work. Also, the rubber rena's door is simply useless in both ways. I can only talk to her after the maze scene, and obviously, I have to teleport out if I want to leave.
About the second situation, if the intention is really to make the rubber rena inaccessible at all times, a "She doesn't want to open the door for you" when interacting with the door would help a lot ^^;