Chat outputs large amount of <reserved_token_163839>

After a few prompts, the chat just sent a bunch of text that just says <reserved_token_163839> over and over again.

```
2<|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|><|reserved_token_163839|>

…and a lot more of the same
```