Animation Sequencer additive Keyframes


I opened an animation sequence and added an additive keyframe layer. After creating a new animation sequence from the old animation, the editor shows the additive keyframe layer. So when I open the edited animation I can the see the additive layer, although I created a new asset from the old animation. After that I edited this animation again and now there are some problems, because I edited the additional keyframe layer. The Sequence shows the correct animation, but If I call the play animation function the character does a strange things.

Does anybody has an idea whether the additive layer cause the problem or how to make an animation from the animation sequence in engine without showing the edit as an additional layer?