Framerate gets worse over time despite event cpu usage not changing in the profiler.

Leaving the game open for a while makes it use more CPU and makes it drop frames. Yet I don't believe I'm the cause of it because in the Profile tab in the Debugger, Event usage remains the same. Frames don't drop over time unless the game is left alone with no inputs, and spamming left click brings the FPS up and lowers CPU usage.

The only section that gradually increases over time if the game is left idle is the Engine's CPU usage.

Let's check your object count.

If there are too many objects were created, they will reduce your FPS.

Object count remains the same, I probably should've mentioned that as well.

if there is no interaction on the players part, maybe the phone is going into a lower power mode where it can't maintain the frame rate, as soon as you start interacting again it goes back to full power?

It's not on phone, it's running on Windows 10.