standing in fake lava, eventually it turns back into normal lava and kills you
is this intended to happen?

it seems to happen when you place it. If I place the "source block" instead of using the F labeled bucket, then I can pick it up with a bucket and get the fake lava, but if I place it with the bucket (the way a player usually would), it gets picked up as lava.

noted that even when placing the "fluid block", after a very short wait it also becomes regular lava.

Should be fixed with c73fe6d