MediaPlayer QML element with GStreamer backend can't seek

Using the latest code in the QtMultimedia repo, and running the example project multimedia/video/mediaplayer, the seekable state of the MediaPlayer always appears to be false after loading a video file and the seek bar cannot be used.

Looking at the code for QGstreamerMediaPlayer, the setSeekable only seems to be called once ever with the value false:

switch (newState) {
        case GST_STATE_VOID_PENDING:
        case GST_STATE_NULL:
        case GST_STATE_READY:
            setSeekable(false);
            break;

Also, the seek() function that the docs describe does not exist, and I am wondering if it may have been deprecated.

That said, the position property does seem to work.