Exploring around in 22w16b. This world has been crashed by my allay several times, so I downgraded it to 22w15a to move said allay and reopened the world in 16b again. 
I decided to go explore into new teretory (the new soundtracks are amazing and give me the feeling to adventure around the world)
Anyways, I went into a chunk with a shipwreck. I have never loaded this chunk before. I opened the chest inside, and after an initial freeze (i could move, but not open chests or get back in my boat), I was able to open the chest and found this 'buried treasure map' See the attachmetn.

It is a normal empty map renamed 'buried treasure map'. What the heck? At least it isn't as intrusive as something as small, cute, and innocent as an allay crashing the game (second snapshot I'm aware of that allays have caused the game to crash. Are they perhaps getting revenge on the nsfw fan artists, but can't diffrinciate the good people from the bad people so they crash everyone's game lmao)