User tooltip not loading properly

Summary

When I mouse over a user's name, I expect to see a popover with more information. Instead, I get a placeholder. If I mouse over any instance of that username again, the link flickers and there is no tooltip.

Steps to reproduce

  1. Hover over a username for a non-system note on gitlab.com
  2. Observe popover with placeholder info (or real info if cached), wait an unreasonably long time if placeholder
  3. Mouse off
  4. Mouseover any instance of username again
  5. Observe flickering of link with no tooltip

What is the current bug behavior?

When mousing over user names attached to user comments, tooltip does not load data, and on subsequent mouse-overs, tooltip does not appear at all.

What is the expected correct behavior?

When I mouse over the user name, it should populate the popover with the relevant user data.

Relevant logs and/or screenshots

2020-01-29_11.49.31

Output of checks

This bug happens on GitLab.com

Possible fixes

(If you can, link to the line of code that might be responsible for the problem)

Edited by charlie ablett