PortalTeleporter is resource hog

I’ve been running some performance profiling and have noticed that the two PortalTeleporters I have on my map are using a ton of calls. I use these teleporters to allow the player to pass through the landscape layer when moving through a cave tunnel.

I’ve tried disabling the SceneCapture component in the portals, but that has no effect.

They are doing a massive amount of these call threads: “Single Line Check” -> “Multi Line Check” -> “Check Actors”:

Does anyone know why they are doing this? And how I can prevent them from doing so. They only need to be active when players are travelling through the cave tunnel, but they are running these calls all the time.