Warren Leathem

It's listed under the constraints under the selection sets. Hopefully this video will help

That is the offset control that gets created when you add a constraint to do offset anim without needing any more setup. You can select it and hide it

manually scrubbing and frame by frame should have no delay at all. If you hit 'p' in the viewport it brings up some options and you can set the Cache Animation from Minimal to none.
If you still have a delay after that, please add a bug with a file