Add the background blueprint (the premade one) and disable visibility. Then make a value called colliding and set it to number of actors with tag a every 0.0167 seconds (make sure that the background actors earns tag a when the player collides and loses tag a when the player stops colliding) then make a rule where if the number of the actors with tag a equals to 1, add tag b to the actors and remove the tag b if its the opposite every 0.0167 seconds. Make sure that you have a camera actor that follows the tag b every 0.0167 seconds. (you can add smooth function and set it to 0.1 for x and y axis for a beter experience) place the blueprint to the place that you want to be followed by the camera. (idk thats it)

I made a test for a roguelike, it's currently public and I'm fine if you use the card system I have (the system only has 6 cards for now)

Wdym