The problem is when the door rotates open it triggers Event Actor End Overlap. I watch it happen when I play my level. As far as I know I have all the correct settings for my Trigger Box. I followed the official Unreal Sliding Glass Door Tutorial to get the correct settings.
Do you have your box trigger set up as a component inside the blueprint? I believe what’s happening is that when your door opens, the trigger box moves with the door and away from the player, triggering the EventEndOverlap once it moves far enough away. You could create a box trigger from the Modes Tab under Volumes and then set up the door behavior inside the level blueprint as in the video here: