My sculpting mode something wrong

hello everyone,
I need to help my blender something wrong in sculpt mode
All of my sculpt tools ignored back side

But I new the blender scene is keeping normal sculpt

I don’t want to migrate all project things to new scene, It’s so stupid and heavy workload.
How to fix it absolutely? :pensive:
Please help
thanks :pensive: :sob:

Your screencapture shows that some Auto-Masking have been enabled in your project scene.
That is probably the issue.

Open Auto-Masking popover in header of 3D Viewport, and disable problematic auto-masking.

Thank you very much~!
it fixed~!
have a nice day~