Demonstrates AnimationTree not correctly triggering an Animation with callback method

I have an AnimationPlayer with one animation that contains just a single call method track. The method called prints hiya to the Output log. This works correctly when AnimationPlayer.play() is called however if an AnimationTree calls the same animation, the method is never fired. This appears to be a bug with AnimationTree.

• git clone
• open the project in Godot and run
• Click the left button to call AnimationPlayer.play() on an animation. hiya will display in the Output log
• Click the right button to trigger an AnimationTree to call the same function. hiya won't display.