"It would be so nice to allow the header and inner elements to be rendered via shared element transition in comparison to the current approach. We'd be able to support much more advanced use cases. Plus, navigation options have proven to be a pretty inconvenient way for people to set up their header in comparison to rendering things inside the screen, where component state can be accessed."

https://github.com/fram-x/FluidTransitions/issues/2#issuecomment-378699206