Never seen anything like this, probably because I made gas bubbles rarer than the default, so it only happened until now.
Happened within seconds of creating a new world.

https://gist.github.com/Sereath/297e006c018d06529ffb9c4c5afa866d

Oh shoot, Im sorry, didnt see that it had already been reported. Now I see it in the commits.

Thank you for the updates.