Low FPS on PC

Product: STAR WARS Jedi: Survivor
Platform:PC
Summarize your bug My FPS drops down from 144 to the lowest.
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? In the game itself
What happens when the bug occurs? Everything lags and works slower
What do you expect to see? Steady FPS with no drops and lags

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It's only FPS that keeps dropping down. During the gameplay when i'm somewhere inside everything works fine but when I'm somewhere outside it drops down and gets worse.