Milestone webhook fires too many when uploading translations

Req:

• a .pot file
• a fully translated .po for the above pot (easy mode: msgen -o out.po in.pot)

1. Go to a Gettext project/version
2. In Settings

• in Webhooks, add a requestb.in url
• In Documents, upload your .pot

3. Select a language
4. Click the dropdown for said .pot document
5. Select Upload translations
6. Select the .po
7. Press upload
8. View the requestb.in page

Actual:
There seems to be a "100%" entry for every textflow.

Expected:
1 webhook was sent