This can be normal depending on the film type and scan settings. Digital ICE works by using an infrared channel to detect dust and scratches, so it does not work properly with some films—especially traditional black-and-white film and Kodachrome. If the scanner detects or is set to a film type that doesn’t support ICE, it may automatically disable the feature.

So first check what type of film you’re scanning and whether the scanner is set correctly. If it’s traditional B&W film or Kodachrome, Digital ICE likely won’t be available or useful. For supported color negative or color slide films, ICE should normally stay available for the final scan.