Confluence 4.2.1
Crowd 2.4

Follow crowd user - view user in network followers.
Delete user from crowd - view user avatar in network which is the question mark as undefined.

result from query cwd_user does not show user still in table for confluence.
run select * from follow_connections where follower like '%username%'

connection is still there.

Result when viewing network followers should handle users that aren't there anymore by NOT showing the undefined avatar.

For more screenshot and backups to replicate view sac ticket at https://support.atlassian.com/browse/CSP-85702