Poser (Rise of the Tomb Raider)

Briefly about the situation: in early game I got to the bear and passed it, then the game begins terribly freesite. After the bears need to cure yourself. Cure and catch the wave of the Frisians. What is the reason? Computer config is below:
CPU: AMD Ryzen 1600X
RAM: 8 GB 2666 MhZ
Graphics card: R9 380 to 4 gigabytes of video memory