The Monk's Mountain Stance has the following requirement:
You are unarmored and touching the ground.
The trait Stance says as follow:
A stance is a general combat strategy that you enter by using an action with the stance trait, and that you remain in for some time. A stance lasts until you get knocked out, until its requirements (if any) are violated, until the encounter ends, or until you enter a new stance, whichever comes first. After you use an action with the stance trait, you can’t use another one for 1 round. You can enter or be in a stance only in encounter mode.
Because of this, the question I have is: Does the Trip action tripping the Monk breaks the "touching the ground" requirement of Mountain Stance?