I'm having the same problem. My newsletter was sent out this morning and only TV shows were shown; no movies or even the title for movies. During my test of the newsletter last Sunday, the tests were working, including the scheduled newsletter the next day (Monday). Today, only TV shows. I've submitted a bug report on github and the dev wants me to try the develop version since he states it fixes a lot of bugs, including plex integration.
https://github.com/tidusjar/Ombi/issues/3048