What drone do you have? There is no Mavic
2S, but there is a
Mavic 2 Zoom, A
Mavic 2 Pro and more recently an
Air 2S.
Sounds like you have an
Air 2S and "Pro Mode" refers to manual control of exposure when you're in photo mode. When you say:
"will be so flashed I can seen screen" - if you mean the screen goes real bright, that is because the exposure is in manual and incorrectly set. Placing it back into "auto" allows the camera to set a proper exposure.
If it is an
Air 2S that you have, you may want to post in the
Air 2S topic section as more folks will be there that have an
Air 2S that can help you.