Subtitles added to SoundWave file hidden by fade to black Widget?

Hi,

As the title suggests, I’ve added subtitles to some soundwaves and they all work fine. But at the end of my level I have a widget that causes the screen to slow fade to black. However, this seems to go in front of the subtitles. I’d have expected a default thing like built in subtitles to work. I’ve tried Z orders but that doesn’t seem to affect the subtitles.

Is this a bug or a work around?

Thanks