Webhook JQL restriction not working for 'Comment Added' event

Summary

Webhooks is still being fired when comments are added to other projects even when JQL clause project= is used.

Replication Steps

1. Open a new session at https://requestb.in.
2. Create a new webhook and add a project= JQL clause to restrict the webhook to only fire on a specific project.
3. Tick the comment added event.
4. Comment on a different project than the one specified in the webhook configuration.
5. Check the request bin session.

Expected Results

Webhook requests should only fire when commenting on the project specified in the webhook JQL.

Current Results

Webhook requests are fired all the time when on any comments.