setFocus in an ENTER Event from AutoComplete Object to AutoComplete doesn't work.
From AutoComplete to TextInput it works.
Tested FocusManager.isEnabledForStage(stage) is false.
Is solved.. my mistake.
It would be helpful if you could provide an explanation of how you solved your issue. Someone else may make the same mistake in the future. If your solution is here, they can find it on Google and solve their problem too!