MS planner gives users in your group suggested attachments for a task.
Please give the option to disable this feature in MS Planner.
This is a security concern because when I create a task for other users in my organization, they see a list of my own recent files (items I was working in my own OneDrive). They do not have access to these files but they do see the filenames and types-- this information is not available to them otherwise and therefore the suggested attachment feature is not only confusing to new users, but it also violates privacy.