I have imported Thinking.fbx from Mixamo and created an action of it, which animates(see below Thinking.fbx image). Next, I imported MyAnimations.glb file that contains various actions. I combined the thinking action with NLA Editor, but it is not animating like others. Please guide how to get the thinking action get animated after combining within the GLB file using NLA Editor. What is the issue? The result is same for Extrapolation set to Nothing, Hold or HoldForward. While importing the file the Animation box is checked in Blender v4.3.

Thinking.fbx

MyAnimations.glb