Problems and issues with Control Rig

Hi, I use Unreal 5.1

I don’t know how to explain my problem. I don’t know if it’s an Unreal bug or just my lack of experience.
I created this Control Rig for this character.
It only has controls on the hands and elbows because that’s all I needed to animate.
I loaded several animations for that character in the Timeline, and then I clicked on Bake to Control Rig.
Then I could see how the body made the correct movements of the animations, and I controlled the hands and created new keys only for them.
In the end, I was able to complete the entire animation, but when I hit Play… the body becomes rigid and only the hands make the animations that I saved.
To regain the rest of the body movement, I have to disable and enable the preloaded animation, and then I can see everything fine again and it stays that way while I slide the timeline… but when I hit Play, the body becomes rigid again…

This is the Control Rig:

This is my timeline with correct pose (animation for the body and IK for hands):

And this is the timeline in the same time when I hit Play (rigid body):

I have to uncheck and check active option in track to see correct movements, but it doesn’t work when hit play.

I also tried to export the animation using the “Bake Animation Sequence” option, but it doesn’t export the hand movement. And “Bake Pose Asset” option shut down Unreal.

Here you can watch a video with the problem: