Speed and Framerate decreasing to half when enemies appear in final fantasy type 0

[Supreem]

Hello everyone,
I have an issue on my laptop when playing final fantasy type-0. As mentioned above whenever enemy/enemies appear on my screen framerate and speed decrease straight to 50%, I'm sorry if this question has been asked but can someone please suggest me a possible solution?
My Laptop's spec:
AMD A8-6410 (2.4 ghz quad core)
8gb Ram
R5 APU(integrated gpu of my cpu)
I'm using the settings,
tried both Vulkan aswell as directx11 Api

All the games work really well except for this probably tiny issue,