Trigger Action: Play Argument

Hey guys,

Whilst tooling around in the mission editor setting up the deck of the USS Stennis, I came across the option to set a trigger action to Play an argument for static units with an argument number, start value, stop value and speed. I opened up the Model Viewer and found the argument for the F-14A's canopy to be open as shown here:

I setup the argument with the values for it to transition from closed to open, and set them up with a mission start trigger as shown here:

Unfortunately, the Tomcat's sat on the carrier deck with no changes as shown here:

This action also doesn't function with objects that are not linked to another object (such as the F-14A to the Stennis in this example), nor does it work with the release version of DCS. I also tried different trigger types such as 'Once' and set conditions such as time is more than 10, but the animation refused to play, and the canopy remained firmly closed.

Update:

It seems this trigger has never worked:

From 2016 by Kippy: Is it possible to spawn an aircraft in this state?

From 2017 by Honza: Trigger - Play argument