Fusion composition does not work on timeline

I've made a Fusion Composition, I set it up and it plays back allright in the Media Out. Then I drag the Fusion Composition onto my timeline and it no longer works. The Composition is text that starts out sharp for some seconds, then blurs as it blows away. On the timeline however it is static with the text just half blurred as if stuck somewhere in the animation - but not quite.
If I open the Fusion Composition from the timeline it also no longer works in Fusion, but if I open by double clicking the Composition in the media library it works perfectly again. - I've tried also to make a new timeline and place it again, but still does not work.

Is there something obvious I've overlooked?

Drag the Fusion Composition to a Timeline, right-click on it in the Timeline and choose Open In Fusion Page, then take a full-screen screenshot of what you see in Fusion.

Then do File -> Export -> Fusion Composition, and zip the resulting .comp file.

Then attach your screenshot and zipped .comp file to a post here.