As long as you're connecting to an "Internal" guider we won't close the shutter while the main camera is imaging. If the imaging camera is idle we will open/close the shutter. Essentially we're treating it like it's behind the main shutter and doesn't have it's own shutter (like the STL).
So it sounds like, at least from your perspective, that this should not change. I'm interested to hear what others with STTs or STFs think. We may need to create another guide option that is something like "Internal w/Own Shutter" for those that do want the guider to open/close the shutter.
Thanks,
Jared