Hi there
Something like this is impossible to provide an "it might be this" troubleshooting shot by just looking at a static image. Heck, even if you provided a link that opened the final result we would have the same issue. Likely, only by having access to the project file and seeing it first hand would we be able to possibly try and suggest something.
I'm doubtful it would help, but on the outside chance it may, perhaps share a screen capture of your Timeline for the slide as well as the properties for the Smart Shape.
Cheers... Rick