About moves (Total War: Warhammer 2)

I recently bought a laptop that seems to be good, in general, I have an amd ryzen 5 4600h processor, 16 gb RAM and rtx 2060. The game is installed on a ssd disk. I play on ultra settings, there is about 50 fps on the campaign map, and when I press the end of the turn, the fps drops to 10-20 and jumps like this. This happens during the moves of the AI, and if he looks like a commander, then I again have all 50 fps and everything is smooth, then the fps jumps again. Tell me this also? In TV about China, the situation is similar, only in wah it is better, I have not tried other TVs yet. In this particular case, as you could understand, it interferes with me, because the moves take longer than it could have been. This is, of course, 10 times faster than my old computer, but still I was hoping to fix all the problems.