In game frame rate drops below 5 too frequently.

It occurs generally around the game, especially turn goes on to the next turn.

I checked the GPU and CPU usage. It was not because the resources are deficient, but because the resources are not exploited.

Whenever frame rate drop happens, GPU clock goes to 0 instantly and recover, so does the frame rate.

Since I did every update for my devices, there must be some issue for optimization of the client.

Please help me for this issue.