Sometimes the GUI (except the text) for the Eye of the Flugel doesn't show up. It only happens it certain locations when facing a certain direction.

Screenshot:

Could it be the Water? I know that water renders wrong sometimes. It renders in front of particles for example. Try to do it on land.

Can't reproduce.

Give me a log.

We play on a server together, so this log will contain this bug as well as the server hang from the other report.