Yes, I just noticed it now, that it's only cropping off where changes made to the 2nd frame are at( I believe I've seen this happen in Photoshop one time as well, but not to the point where I can keep recreating the problem, like with Promotion). If no changes are made to the 2nd frame, then it nearly chops/crops out the whole piece. Hopefully, Mr. Zimmerman may have some type of explanation or a quick patch update, that MAY fix it. I know it's an issue that can be bypassed, but it's still a slight annoyance.
Oh well, at least this could be a good "known issues" log for pixelation users using Pro Motion, heh...