Titles suddenly premium

I am working on a project which I started a few months ago and then left it for awhile and am going back to it now. I had previously shared (exported) the project with no problems. Now, it is saying some of the titles or transitions I have used are premium features and I can no longer export it without upgrading to premium. Did something change? I know I did change my membership in this time, but I only changed from monthly to yearly. Any ideas what might have happened?