### Godot version

v4.0.beta17.official [c40020513]

### System information

Windows 11 Pro

### Issue description

In AnimationPlayer, Audio Playback Track does not work in the middle of playback, as in v3.5.1.stable.official [6fed1ffa3]

### Steps to reproduce

(Do on both versions)
Add root node -> Node
Add AnimationPlayer and AudioStreamPlayer
![image](https://user-images.githubusercontent.com/91904840/216308659-d0327455-73e9-48d6-93b3-b33f4c8f1ccc.png)

Add new animation, Add Audio Playback Track
Drag & Drop audio test.ogg on track with a time offset of 1
![image](https://user-images.githubusercontent.com/91904840/216308947-391718d9-1e9c-4418-9f82-3cc9b6075cff.png)

Play animation before the start of the track, at the beginning of the track and somewhere during the track (turn on the sound)

v 3.5.1

https://user-images.githubusercontent.com/91904840/216314742-80982bb9-23a3-4eb5-8e98-249c3531aa66.mp4

v 4.0.beta17


https://user-images.githubusercontent.com/91904840/216314798-23f212f2-c386-4dc1-8946-648e5f8f2467.mp4




You'll notice, that on version 4.0.beta17 Audio Playback Track does not work in the middle of playback!




### Minimal reproduction project

Normal playback
[godot_3.5.1.zip](https://github.com/godotengine/godot/files/10568517/godot_3.5.1.zip)

Cracked playback
[godot_4.0.beta17.zip](https://github.com/godotengine/godot/files/10568519/godot_4.0.beta17.zip)

StringName name = p_name;
	if (String(name) == "") {
		name = playback.assigned;
	}
	ERR_FAIL_COND_MSG(!animation_set.has(name), vformat("Animation not found: %s.", name));
	Playback &c = playback;
	if (c.current.from) {
		double blend_time = 0.0;
		
		BlendKey bk;
		bk.from = c.current.from->name;
		bk.to = name;
		if (p_custom_blend >= 0) {
			blend_time = p_custom_blend;
		} else if (blend_times.has(bk)) {
			blend_time = blend_times[bk];
		} else {
			bk.from = "*";
			if (blend_times.has(bk)) {
				blend_time = blend_times[bk];
			} else {
				bk.from = c.current.from->name;
				bk.to = "*";
				if (blend_times.has(bk)) {
					blend_time = blend_times[bk];
				}
			}
		}
		if (p_custom_blend < 0 && blend_time == 0 && default_blend_time) {
			blend_time = default_blend_time;