yeah thats where i took the screenshot from. On the end overlap you are not getting the overlapped actor, but instead disabling the trigger for every actor in the array.
Which would make me think you wouldnt do damage to any actor, but I think if you setup the debug text or something similar that will help narrow down where the issue is.
You can just set each actor to put their name and variable status to the log if you wanted to do it that way. Then you can review it after exiting play mode.