When I speak for myself: our music team e-mails the songs / lyrics to us. And we check if the lyrics conforms to the lyrics in OpenLP. When not or when a song is missing we change or add it.
This morning this issue has popped up again. So I made a screen shot. Hopefully you can solve this issue... Configuration: OpenLP 2.4.6, PowerPoint 2016, Windows 10 Fall Creators Update.
Good point! Sometimes I have to change the background image of a PowerPoint presentation and after that I have to re-import it in OpenLP. It would be a help if that is not necessary anymore.