FPS drop on snow

Product: GRID Legends
Platform:Steam-PC
Summarize your bug Big fps drop on snow scenery
Please specify your platform model. Steam
Did you have cross-play enabled? No
In what game mode did the bug occur? Offline Career
How often does the bug occur? Every time (100%)
Steps: How can we find the bug ourselves? Just play
What happens when the bug occurs? It’s a design issue.
What do you expect to see? Keeping a constant fps performance between all the weather different scenarios.

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Big FPS drop (30 less) on snow scenery .