General nesting of Sequential/Parallel Transitions does not work as expected. In the following example code, the second FadeTransition, which is outside the ParallelTransition, but part of the SequentialTransition content, is played in parallel with the Scale and Path transitions:

SequentialTransition {
                node: photo
                content: [
                    
                    FadeTransition {
                        duration: 1s
                        fromValue: 0.0
                        toValue: 1.0
                    }
                    PauseTransition {
                        duration: 2.5s
                    }
                    ParallelTransition {
                        node: photo
                        content: [

                            ScaleTransition {
                                duration: 14s
                                node: photo
                                toX: .35
                                toY: .35
                                autoReverse: true
                                repeatCount: 2
                            }

                            PathTransition {
                                duration: 28s
                                node: photo
                                interpolate: Interpolator.LINEAR
                                path: AnimationPath.createFromPath(Path {
                                    elements: carouselElements
                                })
                            }
                        ]
                    } // ParallelTransition


                    // This FadeTransition should play sequentially, but
                    // it plays in parallel.
                    
                    FadeTransition {
                        duration: .2s
                        fromValue: 1.0
                        toValue: 0.3
                    }
                    
                ]
            } // SequentialTransition