pdfplumber rotates all pages in pdf

Question

I am trying to read a PDF using pdfplumber and it usually works, but if there is one page where the text is rotated, it rotates all other pages as well. This is the code I use:

import pdfplumber

pdf_path = "some_pdf.pdf"

with pdfplumber.open(pdf_path) as pdf:
    for page in pdf.pages:
        print(page.rotation)

Which outputs:

270
270

The first 270 should be 0 and the second is correct. Assuming that zero means that the text is readable without rotating.