I found a glitch while playing the old plot in the version 0.11.4B-Fix1 version of the game .
When I was playing the Act 1 , chapter 5 of the old plot , at the end when I put the ravenclaws Diadem to end the chapter to move to the Act 2 of the old plot. The game crashed during the bed room cutscene with Helena at the start of the chapter 1 of the Act 2 in the old plot .
Also , when I tried to start the chapter 1 of the Act 2 of the old plot by using chapter select option in the menu , game Crashed again.
If i remember correctly, in the previous versions the old plot didn't had these issues 😕