I am getting quite decent FPS while playing the game.

However, when the UI tries to render any 3D - that includes map, character model or weapon model in crafting, the FPS drops to less than 10 and recovers after a while. Is there any solution to this issue?

This happens every time when switching between in game render and UI render.

Here's a video of it:
And here are my specs:
AMD Ryzen 5 3600
Powercolor Red Devil 5700XT
16GB RAM 3200Mhz
1TB SSD