I have a collage clip that should be cross-fading into a picture clip but for some reason the collage is not fading which results in no transition between the clips. This seems to be happening whenever I use a collage. I see the crossfade transition icon in the timeline and storyboard modes but the rendered output and the preview show no transition at all. My hardware is Gigabyte Aorus Gaming 9 X299, Intel i7-7820X with 128GB RAM and two SLI connected MSI Nvidia GeForce GTX 1080 Ti. Any suggestions on how to resolve this appreciated.