Apple pencil won't make straight line in books app (auto-straight doesn't work)

Hello, since yesterday, i just realized that my apple pencil won't make a straight line (the auto-straight doesn't work) in books app. I checked the settings of my apple pencil so many times and i found nothing wrong. I also tried to make a straight line in other apps (kilonotes and notes app) and it actually worked. So it doesn't work in the books app only. If there's any suggestions to solve this problem, i will be so grateful. Anyway, I already sent a complain straight to the apple team but up till now, i haven't gotten any reply.