Time Trigger has stopped working in macOS 10.12.3 (Sierra)

Has anyone else had an issue with the Time Trigger since upgrading to latest version of Sierra? I use a time trigger to launch an iTunes playlist and adjust the AirPlay speaker volumes on certain days, so that it appears someone is home.

This has worked perfectly for nearly 2 years, but now it has suddenly decided to stop. The macro runs if I select Try or if I trigger it from a Calendar App. I can trigger it from nearly any other method, except the Date/Time.

I have tried deactivating my screen saver and screen lock, but to no avail.

I would be most grateful if someone has a solution, or at least let me know that this is a known bug since the upgrade. I can then temporarily use Calendar Apps to trigger it until it’s fixed.