Share a page with group does not generate workbox notification for users

Summary

Share a page with a group does not generate Workbox Notification for users included in the group. Only notification email is sent.

Steps to Reproduce

1. Create a Group with any names and include some users in the group
2. In any Page, click the Share button on the top right corner
3. Type in the group name and select it from the search result list
4. Click the Share button to share the page to the group

Expected Results

Every user in the group will receive notification in the Confluence Workbox Notification, as well as an email regarding someone shares them a page.

Actual Results

Every user in the group only receives email notification. No Workbox Notification is received.

Notes

Sharing the page to individual user by typing their names in the field will allow the users to receive both email and WorkBox Notification. Only sharing with groups are not working as expected.

Workaround

Type in the user's name one by one in the Share field