### Basic info - Commit SHA: 7097cb8f39b874c0d1875cafbef7bd656b1bb34a - Platform: ### Bug description The digest function for ISM with discrete objects does the gain calculation with a wrong number of objects for combined formats, since it uses the number of transport channels as number of objects and not the distinct number of objects available in the main decoder struct. ### Ways to reproduce (Clear steps or refer to a failing automated test, e.g. with a pipeline link) <!--- Below are labels that will be added but are not shown in description. This is a template to help fill them. Add further information to the first row and remove and add labels as necessary. -->