Here's a paste of the code. The rpint statements are there to help me debug.
In the above code, "finished" is only printed if the animation is actively playing at the point it reaches the if conditional (if the current frame < final frame). In that case, the yield works as expected. It waits, then continues to the print statement and the queue_free.
If the animation has already finished (current frame = last frame) by the time it reaches the $AnimatedSprite.is_playing conditional, it still returns true (the print statements both show) but the yield doesn't return.
So it appears as if the animationfinished signal is not being called on an animation that has already finished, even though isplaying is still considered true.
Any idea what I'm doing wrong here?