with the waypoint teleport, when you teleport most of the time you appear upside down at the teleport spot, then falling down
the way i fixed this is i edited the jumpheight of the character then before i alt+tab out game to press the waypoint button i first jump up, then alt+tab out game to press button, then alt+tab back to game and always you appear then above the spot where you teleport to, falling down till landed, this also resolved the upside down problem , and most of the time falling thru map problem.
maybe a possibility for you to use it in the editor?
I've included a "teleport with increased height" option during the 'beta test' of my editor but it was buggy. Currently I'm porting the editor to the new (CH) design i've created. My plans are to improve the teleport feature and if i do so, i'll definitely find a solution on this.
Mah, english isn't great but i hope you've got it.