Ho ! I get it! gizmos use rotationQuaternion. Once you bind the mesh with the gizmo, rotation is not used anymore but rotationQuaternion is.
When animating with quaternion:
Ho ! I get it! gizmos use rotationQuaternion. Once you bind the mesh with the gizmo, rotation is not used anymore but rotationQuaternion is.
When animating with quaternion: