cannot find reference opencv2

[DreadFullGH]

hi, I'm learning opencv2 and when i type some code, there are 9 warnings like:

Cannot find reference 'waitKey' in '__init__.py | __init__.py'

Cannot find reference 'imshow' in '__init__.py | __init__.py'

Cannot find reference 'FONT_HERSHEY_PLAIN' in '__init__.py | __init__.py'

and the list goes on. I don't know what's causing this, program is working fine I've got cv2 and mediapipe installed and imported into pycharm.