Can't read past chat anymore “This conversation is too long, please start a new one.”

I am not sure if this is a bug, but old chats I had that reached the max length are no longer able to be read at all… At first the screen will take me back to New Chat and say, "This conversation is too long; please start a new one." Then if I open the chat again, it will stay blank forever. I don’t need to be able to chat, but I like looking back at my stories in my free time, and this was one of my favorites. I have tried getting a data export, but I guess they picked and chose which chats to export, as chats that I haven’t touched in months were sent over, and only 6 conversations were sent.