Audio's On ended doesn't trigger when it should have, why?

so I have a sheet like this:

Audio On "rhymes" ended -> Audio Fade "nursery BGM" to volume to -100 over 2 seconds, then stop

Audio On "nursery BGM" ended -> system go to rhyme_level_1

but the game doesn't go to level 1 even though the nursery BGM ended. Does someone know why?

Edit: I heard the nursery BGM fades out, so the first trigger did run