equipping the "moskstraumen headwear" makes unable to open worlds, and gives "server sent broken packet"

Unlocking the Moskstrauman advancement gives the headwear through, killing the elder guardian, however i’ve encountered wearing/equipping it makes me unable to play my worlds, but when i unequipped it, I can play my worlds again. I hope this minor bug or issue will be fixed, since unlocking rewards through game advancement and being able to use it, is a very rewarding experience.