Today I've noticed that autocomplete in SearchBox does not on my service and when I was checking official example from Google it did not work even there.
https://developers.google.com/maps/documentation/javascript/examples/places-searchbox
Does anyone know what's happening? >)
UPDATE
This bug was handled in issue tracker https://issuetracker.google.com/issues/74048143. It was marked as Fixed in version 3.32 on March 2, 2018.