When we do that, the Live Activity is immediately ended without any alert or sound. The dismissal-date is only used for the Lock Screen.
It no longer shows on the Dynamic Island.
Yet it says on Lock Screen with content-state that's correctly off of the end event.
I suspect that the Dynamic Island is only to be used for an active activity. And calling the live activity puts it in an inactive/ended state. Hence it gets removed immediately. Wondering if that theory is correct...
endevent