Can not get message from folder

Version used: 4.1.2
Php 7.2

I can fetch all folders using `getFolders`.
I can count messages in a specific folder using `$folder->messages()->all()->count();`
But there is no message inside when I do `$folder->messages()->all()`

```
Webklex\PHPIMAP\Support\MessageCollection^ {#3188
  #total: 2
  #items: []
  #escapeWhenCastingToString: false
}
```

Did I misconfigure the client ?

Thank you