I've tested this in Godot 4.2.1 and Godot 4.4.1, installed through the AssetLib tab in Godot. In both versions, the animations in the AnimationPlayer have the transformations happening at the 0s mark ...

Attached are two images and two videos, one video that shows the behavior in godot, and one video that shows the default behavior in unity (and the desired behavior.) We have two animations, a walk ...