When the item was added to the container (layout card) with animation, it is not possible to destroy it without error:
http://new.senchafiddle.com/#/oLPqA/

Items are removed from DOM, but container trying to set active item because its still in innerItems property of container.

To fix it I do next on deleting:
Code:
if (container.activeItemAnimation) {
    container.activeItemAnimation.destroy();
    container.activeItemAnimation = null;
}