TNT Launcher does NOT throw the Player

Folowing this tuttorial:

http://www.instructables.com/id/Human-launching-tnt-cannon-simple/?ALLSTEPS

Does not work, as the player stays in the same place when the TNT ignites. Reported in the past, but a moderator marked it as Resolved before commenting on the issue itself once the bug report was updated.

See: MC-78565