Connect apps for Jira always show masked avatars (the user's initials) while the the visibility settings are respected in apps for Confluence

Issue Summary

Connect Apps for Jira Cloud always display masked avatars (the user's initials), also for the logged-in user and/or for the users in the same Organization. This works fine in Connect Apps for Confluence Cloud.

As written in CONFCLOUD-73528, this is caused by the fact that, while in Confluence the request to get the avatar is sent as the logged-in user, in Jira this is sent as the App-user. Therefore, as written in the Profile visibility page for app developers: unless the profile picture is public the app always shows the masked avatar.

Steps to Reproduce

1. Update your Profile Visibility settings so that the profile picture is only visible to you (or only to you and the organization)
2. Install the Confluence app Whiteboards: collaborative flows and diagrams in Confluence 
3. Create a new board, in the upper right corner see that your profile picture is displayed
   
4. Now repeat the same test using the app for Jira: Whiteboards for Jira: team collaboration

Expected Results

As in Confluence, the user picture is displayed

Actual Results

A masked avatar (the user's initials) rather than the profile picture is actually displayed:

Workaround

Currently there is no known workaround for this behavior. A workaround will be added here when available