When duplicating an Actor at Runtime, the duplicated Actor won't execute any tick events when duplicated from the World Outliner or Alt-clicked and dragged in the Viewport. If the Actor is dragged in from the Content Browser it will execute the Tick event.
This issue was reported and tested in 4.20.2 (CL-4302132). This was reproduced in 4.19.2 (CL-4033788) and Main 4.21 (CL-4324949).
Results: Duplicated Actor won't run Tick Event
Expected: Duplicate Actor executes Tick Event
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-63505 in the post.