Bug on creative and survival

You may not move X/Z when floating if you are not sneaking

Description:
sneaking to the "nothing" (edge) will make you to stay floating. if you go to a corner you can see that you gte standing in an invisible block. You can't fall even if flying, becuse when you sneak and go down you will be limted.
You will stay next to the block (0). You will stand next to the block behind in Column (A) if you destroy block (0).
You can put blocks below (column B) You cannot put more blocks in column (A) from where you are standing (beside, in the column B)

unless you jump and right click to place a block above Column (A) or Column (B). when digging down in Column (B), you reach the limit when you go
to the same level of the last block in Column (A).
bug will keep even if you completely destroy all colums without mooving in X/Z angles. Bug disappear when mooving in X/Z angles. when column A is
made of blocks afected by gravity and you destroy blocks below, you will get a block lower. As much as you destroy, as lower is the level you are standing
in Column (B). Fixes when jumping (you go to one by one to the last block in column (A) position).
When Column (A) start with a torch, then above is a solid block and above it is a big column of a block/s afected by gravity, yo may not destroy Solid block,
or you will fall as if you were above the block/s afected by gravity.

See full text in Bugs.txt (Unicode)
See images for information.