Thanks for the files. I don't think I can do anything on my end, as it's a scripting issue, probably comes from the way Fujino saved it, as they might have used the ChatGPT version to do it, and the files in the GPT version are modified from the base Chinese. I don't know how you can access it through the main game (it might not be possible), as I finished the game and couldn't go to it. But I had to delete those saves because of weird plugin issues too, so I don't have those anymore.
I did make a mistake in that gallery room, as "Playback Room (may be buggy)" is supposed to be the Chatroom.
Also, since you mentioned not all the scenes are in the recollection room, I went to check the map it takes place on. Sorry, it doesn't contain any of the new scenes, so there's no way to get to them except by playing the game all the way through.