Whatsapp Chat Export Problem

Hello everyone,

I want to export one of my Whatsapp chats to Telegram, but only the last 4-5 messages of my chat is exported. The problem is not with Telegram... It's Whatsapp that doesn't select all the messages and media. I know about the 10,000 and 40,000 messages limit and my messages are not that many, just a couple hundred. And the weird thing is that it's only one of my chats that has this problem. Other chats get exported with no issue.

Has anyone experienced this problem? Is there a fix?
I have uninstalled and reinstalled my Whatsapp too. Not fixed!