AnimatableBody2D animates only one property when sync_to_physics is enabled (using AnimationPlayer)

[stephanbogner]

Tested versions

Godot v4.3.stable

System information

macOS 14.6.1 - Vulkan (Forward+) - integrated Apple M2 Pro - Apple M2 Pro (10 Threads)

Issue description

1. I am animating a AnimatableBody2D using an AnimationPlayer
2. The AnimatableBody2D is not moving unless I turn off sync_to_physics
3. I tried with bezier curve animation and without, no change
4. At some point it animated at least partially, now (with no conscious change) it doesn't animate at all
5. Since it does animate with sync_to_physics turned off I assume it's not an error on my side

If anybody has any ideas, please. I have no clue anymore ...

Potentially related issues:

• Updating rotation and position of AnimatableBody2D in code only updates using the last instruction when sync to physics is enabled #76685
• AnimatableBody2D doesn't work when parent moves #58269

Steps to reproduce

I am not able to reproduce it from scratch, but I extracted the problem from my larger project:

1. Open and run the project (with visible collision shapes)
2. Shape should move, but doesn't 😭
3. Turn off sync_to_physics on to animatable_body_2d and run scene
4. It now moves 😤

Minimal reproduction project (MRP)

bug-animating-animatable-body-zip.zip

[stephanbogner]

I think I figured it out 🔥: Multiple "channels" won't animate in parallel

• A) Works ("normal" animation)
• B) Glitches (position is split up into x and y when using bezier curves)
• C) Works (bezier curve animation but only one axis)

→ Only one property will animate properly. If you add a rotation channel, then either position or rotation won't animate anymore (when using sync_to_physics).

bug-animating-animatable-body-alt.zip

[stephanbogner]

So it's probably the same underlying issue as @ZeAntwan encountered in #76685

[stephanbogner]

The code seems pretty short, so maybe it's not hard to fix ... but I don't understand anything 😭

[reach-satori]

Reproduced, in animation3d too. It looks like the transform is set each frame as many times as there are tracks separately, so only the last one applies.
Also happens, for example, if you add a 3d rotation track after adding the bezier: then only the rotation happens.