Insufficient permissions for Flatpak to receive files

## What Happened

Dragging files from Files to Web does not work. GitHub insists that 'the file is empty', WhatsApp says that '1 file you tried adding is not supported'. Protonmail cannot add the file as an attachment. The file can be opened, viewed and edited just fine. While the websites can recognize that a file is being dropped, and can correctly identify the file name, it seems that they cannot receive the file. It should be noted that adding files using the file picker does not work either. The issue ceased after I allowed Web to access my home directory in Settings-> Applications-> Permissions.

## Expected Behavior

Dragging and dropping files into Web, and choosing the file using the file picker should work as expected, and websites should be fed the correct file.

## Steps to Reproduce

1. Open a website that supports drag and drop, like GitHub
2. Drag a file and drop it into the designated area on the site
3. The website does not receive the file

## Platform Information