It seems to have been renamed 05S any ideas why?
Because 96s is the Invest number (Invests are numbered from 90 to 99) and the S stands for South-East Indian Ocean (Region VII - Perth forecast centre).
An invest in meteorology (short for investigative area, alternatively written INVEST) is a designated area of disturbed weather that is being monitored for tropical cyclone development. Invests are designated by three separate forecast centers: the National Hurricane Center, Central Pacific Hurricane Center and Joint Typhoon Warning Center.
05s is the storm number and is given when the system reaches tropical storm strength or stronger.
https://en.wikipedia.org/wiki/Invest_(meteorology)