Unlike simple "trigger all at once" approaches, modern frame modes use:

What (IP cameras, webcams, or custom sensors) powers your project?

Since the update optimizes for motion vectors, your phone now handles flawlessly. Record a skateboarder doing a kickflip moving from left-to-right and towards the camera. The old firmware would lose focus. The updated mode keeps the skateboarder in sharp relief because the telephoto (distance) and wide (lateral) are talking to each other.

The algorithm requires at least a 10% overlap in fields of view between adjacent cameras to successfully pass motion data.