Hmm, there isn't any reason that choosing a different output profile should affect what's in the produced video. By any chance are you working with vertical (9:16) clips? There is a known issue with several media players where the bottom of vertical videos is cut off and if your text is near the bottom it might not show up.
If that's not the case, it would really help to see your timeline as requested in my last post.
Even better would be if you're willing to share the actual project, you can use Pack Project Materials under CD's File menu and upload everything to a folder on OneDrive or Google Drive, then paste a publicly shareable link to it here. Please see this
FAQ for more details.