Can you show where this glitch is being discussed?
Edit: Is this about the New Game+ Max Bond Points (among other carryovers) or actually editing the values while in-game? If it's the latter, then my concern is lightened.
Unfortunately source was 4chan so I can't link it. Someone posted being barred from opening the old schoolhouse's front door and assumed his use of Cheat engine to alter bond point values directly in-game was at fault (and that was all he used it for). Another poster chimed in that it happened to him too. Someone else showed them how to max bond points using the NG+ clear save and one or the other later confirmed he was able to enter and begin the quest using only the save file.I assume this does not happen if you use the modified clear save.
Though it is possible they may have just forgotten to talk to Vandyck before trying the door, he's supposed to hand you the key to get in right? Ha. Well whatever, it seemed like it could be a serious problem so I brought it up.