i have some crossfades and when i try to export instead of crossfading it just cuts quickly and replays part of the clip i am fading into. everything is rendered, but right when i hit export (using my own quicktime settings) it gives me the red "you need to render me" bar for about a second right over the crossfades. how can i fix this? its probably easy to just do the manual crossfade but its still a bit annoying!