Issue Summary

When you mention a user in Safari, if you start typing "@" or @usern without pressing enter after the first name found and try to find the user in the list by using the arrow keys, trackpad or mouse and then select a user, it will be added in the page the mentioned user + an extra @ after the mention.

Example: text in the page after the mention is added will be: @userhere @ 

example 2: searching for user2 start typing @use and use the mouse to select the user, after the mention is added, the text used to search for the user "@use" is added after the mention.

Steps to Reproduce

1. Create a Confluence page
2. Start typing the @username (from an actual user in the site) and press enter for the first result found
3. In a new line, start typing @us (from an actual user in the site) but don't press enter for the first result. Use the mouse or arrow keys to select the user - If there is only one result, navigate between the option from the user name mention and the "Add team to Confluence" before clicking to select the user

Expected Results

User mention is added to the page without any additional text used to find user.

Actual Results

The text used to find the user is added to the page after the mention added to the page.

Workaround

After typing the @ and the username, press enter to add the user mention without using arrow keys or the mouse.

Use another browser like Chrome, Firefox instead of Safari.