Cancelling a jump into an air normal with 0F delay causes character to freeze in the air and float.
Example: https://sfvsim.com/#JRI*-1.500000GUARDNONE%5B%5B%22JUMP_V%22%2C0%2C1%2C~%5D%2C%5B%228LP%22%2C~%2C~%2C~%5D%5D!JRI1.500000GUARDNONE*%5B%5B%22JUMP_V%22%2C1%2C1%2C~%5D%2C%5B%228LP%22%2C~%2C~%2C~%5D%5D!BOTH
I picked a couple normals/characters at random and it seems consistent. With 1F+ delay, the float doesn't happen.