Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
I thought I was going to land like I would in single player.

What actually happened was...:
Describe what happened here
I fly to the ground. But when it starts to lag, I sometimes go through the block I'm standing on.

*Steps to Reproduce: you go into flying mode or creative mode on survival. When that happens, you start flying. When it starts lagging and your trying to get to the ground, you go right through the block. It happens sometimes not all the time. But it happens often.