await does not work when waiting for audio signals

[MBCX]

Tested versions

• Reproducible in Godot 4.3.dev3.
• Not reproducible in Godot 4.3.dev2 and before, neither Godot 4.2.x

System information

Godot v4.3.dev (d335281) - Windows 10.0.22631 - GLES3 (Compatibility) - Radeon RX 580 Series (Advanced Micro Devices, Inc.; 31.0.21910.5) - Intel(R) Core(TM) i5-9600K CPU @ 3.70GHz (6 Threads)

Issue description

When using the await keyword to wait for an audio to finish with the finished signal, the code gets stuck and never executes the line after, even after the audio itself finished playing.

This issue only occurs for audio signals, others like await get_tree().create_timer(1.0).timeout behave fine.

Here's 2 videos, first in Godot 4.2.
TestGodot42.webm

And Godot 4.3.dev3
TestGodot43.webm

Steps to reproduce

1. Have a AudioStreamPlayer node attached to your scene
2. Include it in your script.
3. Play the audio, and await <audio>.finished
4. Put a statement like print("Here") and notice how it never gets printed.

Minimal reproduction project (MRP)

Music Finish Await.zip

[KoBeWi]

Duplicate of #87802