Forgotten Trick to get a new feat?

[KunoichiSong]

So... Forgotten Trick lets you spend 2 Ki to temporarily learn a new Ninja Trick.

What happens if I choose to learn something like Combat Trick?

I get a new feat when I choose to take Combat Trick, but it's not like your Shadow Clones created by the Shadow Clone Ninja Trick disappears when you lose the trick, so does the Feat that you chose still disappear?

I mean it probably does, and if it doesn't, then it should, but...

[Val'bryn2]

You can use the trick for a number of rounds equal to your level, so once that's up, it disappears. Works similarly to the Martial Flexibility ability, in that regard, I believe.