UE4 4.17 FPS decreasing over time

Been producing a 3D puzzle game solo for a while. It’s been running smoothly (120fps on my computer, my lesser laptop is even running it at 45fps) until I started fully fleshing out one of the levels. This level in particular has a lot of power switches in it (6 in total), and I have discovered that after 5 switches the FPS decreases rapidly, from 120fps down to 25fps in just one minute.

The image of the blueprint is attached. If anybody could give me any insight on the issue at hand, I would greatly appreciate it.
Thank you for your time.