Wrong folder status?

[skurrilewelt]

Maybe I miss something but it seems, that the folder status isn't reliable or not up to date in every situation.

I get the folder with

$folder->getStatus()

Result is:

 ["flags"]=>
  array(1) {
    [0]=>
    array(6) {
      [0]=>
      string(9) "\Answered"
      [1]=>
      string(8) "\Flagged"
      [2]=>
      string(8) "\Deleted"
      [3]=>
      string(5) "\Seen"
      [4]=>
      string(6) "\Draft"
      [5]=>
      string(10) "$Forwarded"
    }
  }
  ["exists"]=>
  int(12)
  ["recent"]=>
  int(0)
  ["unseen"]=>
  int(1)
  ["uidvalidity"]=>
  int(1645189988)
  ["uidnext"]=>
  int(14)
}

If I fetch the unseen messages with

$folder->query()->unseen()->get();

it says 4 which is correct. Furthermore the value of uidvalidity doesn't change, where uidnext is correct. Is there a way or is it needed to update the status or force an update so that the given data will match the server status?