Cannot toggle "Confidential Comments" webhook integration on
Description of the problem
On the page https://gitlab.com/openpowerlifting/opl-data/hooks/370632/edit, we have a webhook integration set up for Zulip chat.
Currently, "Confidential Comments" is unchecked. If I check "Confidential Comments", scroll down, and click "Save", it takes me to https://gitlab.com/openpowerlifting/opl-data/settings/integrations which suggests that saving succeeded.
If I then re-open the webhook integration page by pressing the Edit button, "Confidential Comments" is still unchecked. In chat, we still do not receive confidential comments.
Which Group/Project (with full path) is experiencing the issue?
https://gitlab.com/openpowerlifting/opl-data/hooks/370632/edit
https://gitlab.com/openpowerlifting/opl-data
Approximate date/time when the error occurred.
2018-08-17, 3pm Pacific.
Describe what you were doing right before the issue occurred.
Nothing GitLab-related.