View of someone 'User Profile' - my own avatar is changing.

Summary

When viewing another user's profile, the current user's avatar changes.

Steps to Reproduce

1. Create another user with a different avatar
2. Access this URL ( update the username ):
   • https://jira.mnemonic.no/secure/ViewProfile.jspa?name=<USERID>

Expected Results

The current user's avatar should not change.

Actual Results

Their profile picture is shown in the rightmost icon on the navbar, where the current user settings and profiles are located.

The issue was raised in the community : https://community.atlassian.com/t5/Jira-questions/Viewing-other-user-s-profile-makes-their-profile-picture-appear/qaq-p/1263397

The avatar gets reverted to the proper one, once the visitor user navigates from the profile page.