Hokkaido - Guardian Angel Feat issue/bug?

[Dahn]

Is anyone else having an issue with unlocking the Guardian Angel Feat?
I've set it all up just right, triggering the chip in the doctor's head to depress him. He complains his way up to the garden and stands in place, does his little speech and I trigger the chip again.
The doctor says his bit "What an achievement... blah, blah, blah, complete" etc, at which point I leave the level. (Already completed the actual objective)

But the Feat never pops up!
I've checked walk throughs, followed them step by step, still it doesn't activate.
Am I missing something essential, or is this Feat bugged at present?

[Kunovega]

I'm at 100% so it worked at some point

[yim]

Just trigger the medicine at random points it'll work one of those times. It's good to have a save around the time he starts talking at the place he falls.

[Morthoseth]

You have to trigger the chip at the right time. Just before he would jump.

[Aetherius]

Yeah it took me a few tries, you gotta be realllly close to the time when he's about to jump.

[Dahn]

Finally managed to get the Feat to pop!

Literally the last moment before he begins the animation to jump over the ledge, and the "What an achievement... etc" comment didn't even fire! Why else would he say that unless it was a nod to the player completing the Feat?
Bloody IOI trolls. :-p

Thanks to all of your comments, I'm now at 100% completion with that done. ;-)