Breaking change
The hashing algorithm has been changed to fix an issue with rule 20 of the standard. It has also been changed for exception canonical expression in sensorReports. Finally, nested custom arrays and objects are handled differently in the pre-hash string and useless zeros are truncated from numbers given as strings.
How are you impacted?
generateHashID() might return a different hash from the earlier versions. You will only be affected if you have multiple custom extensions in a bizStep or bizLocation, if you have an extension in a sensor-related element, or if you have some specific custom extensions.