Reset spatial tracking?

Hi folks--

We are trying to add a feature that allows the user to tap a button and reset their spatial tracking. In other words, we want them to be able to release the current spatial target and acquire a new one. Imagine a user viewing an experience using a table as a spatial target, and then the user wants to turn around and show the experience on a different table in a different part of the room. We are hoping to avoid having to do a complete reload of the experience, we just want to let them get a new spatial tracking target.

I've tried setting the "tracked" property on the spatial target to "false", and I've also tried generating a "trackinglost" event on the spatial target. Neither approach worked. For now I'm using location.reload() to restart then entire experience, but that's still a heavier type of reset than what I'd like.

What I'd really like is a service on the spatial target to release or reset tracking, so the user can acquire a new spatial target. Is it possible?

--Clay