Most important announcement: There is no Frontliner stamp issue on 20 May 2021 in case anyone still have not figured it out.
Here is the latest stamp issue programme:
The COVID-19 Frontliners have been moved again to the end of June: 29 June 2021.
However a surprise “Hidden Treasure of Malaysia – Island” was move to 22 June 2012. There is no information on the issue.