Sufficating in Oxygen and tons of Morbs

I've only hit a few bugs in the game so far, one being already noted - infinity tasks/invisible blocks

The one that gets me is that I've had my little duplicates suffocate in breathable air while very breathable air was within reach for them. The other is just annoying, spawning a world with all sides of the spawn point are within 10-20 blocks of morbs making it very difficult to expand.