I am trying to add animation clip onto the timeline in runtime and have them blended with each other. However, the overlapping part of the animation clips which should be blending between animations does not work properly. And I found out the animation blending on Timeline works well when timeline editor window is open, but it broke when the window is closed. Through the PlayableGraph Visualizer, I found it seems to be a input weight of the playable problem when process into the mixer. Both weights of the animation clips become 1 when they should be a blending weight. Is there anything I missed after adding clilps on to the track, which can help compute the playable input weights?