If we get nitpicky, Ben vanished in while being cut in half. There wasn’t even a bisected body to hit the floor. Yoda took longer to disappear, so there doesn’t seem to be one version of the ultimate Jedi trick. And if we include Qui-Gon, his body was around long enough to be cremated. If it had vanished during the funeral, there would have been a lot of witnesses.

Is it 100% for certain Anakin’s body was still in the armor when Luke burned it? The presumption has long been the body vanished during the bonfire. Seems to me if there were any bone fragments left over, Ben would have recovered them along with the mask.

The first time I saw TFA, I thought this might actually be Anakin’s ashes.