[Experimental EXE] CH8 Crash when pressing "Read again" button at Bern's game

## Bug Information

**Describe the bug**: During Bern's game, the game crashes when pressing "Read again" for a user

**To reproduce**: Click "Read again" during bern's game

**Expected behavior**: The game should show 6 buttons for you to choose which subsection to start from

## Install Information

**The game**: You should only report Umineko Answer issues in this repository (use [the question arc repo](https://github.com/07th-mod/umineko-question/issues) for the question arcs

**The mod variant**: ADV

**I installed the patch**: ???

**I bought the game at**: ???

**Mod Install Date**: ???

I couldn't reproduce the crash on my own computer, but there does look to be some funky stuff to do with the buttons during bern's game. I feel like there may have been a report related to this in the past, but it seems very infrequent (this user also has more crashes than other users)

The issue is about a crash in Bern's game when pressing 'Read again'. Examine the game's code for the Bern's game section, particularly the button handling and state management around the 'Read again' functionality. Look for existing reports or commits related to this crash. Reproduce the issue if possible, then debug to identify the cause of the crash and the 'funky stuff' with buttons.

Written by the indexing model from the issue text.