glTF 2.0 animations not correct

[Tyler-Yocolano]

Godot version

3.3.2.stable.mono.official

System information

Windows 10

Issue description

glTF 2 Animations not playing correctly from Blender 2.9 export. Some bones are not positioned properly and it doesn't look right. In comparison, an ESCN export of the same model looks exactly as it does in blender.

Steps to reproduce

I've attached a zip file containing my humanoid blender model and a simple godot project which has a side-by-side of the glTF 2 vs ESCN export playing the 'running-loop' animation.

Minimal reproduction project

Godot glTF 2 Animation Bug.zip

[fire]

I'm trying to verify that #48375 is a fix for this, but I'm not sure.

[TokageItLab]

@fire It looks like the problem is that some keyframes are lacked when importing or exporting the animation

[fire]

Please disable

It has been reported several times that the animation optimizer loses important keyframes.

[aaronfranke]

@Tyler-Yocolano Does disabling the optimizer fix this for you? Also, does this occur in Godot 4.x, or only Godot 3.x?