I think it may be related yesterday's update. now we have a user upload a file, but the file he upload cannot be seen by others, like below:

I used my name to upload file in maniphest task as below:

You can see file link in field. but when I open it with another user name:

I think it is because file has not been inherits its paraent's permission. when I use the file link to access directly, it tells me below while I set the maniphest task visible to all users.
You do not have permission to view this object.
Users with the "Can View" capability:

darren.tao (Darren Tao) can take this action.
The user who uploaded a file can always view and edit it.
Files attached to objects are visible to users who can view those objects.

it blocked us, can you check asap? we did not hit such issue before only after yesterday's upgrade.