Avatar disapear on board cards assigned

Summary

When I click on a board card to get the issuable sidebar, my avatar on the card disapear and is replace by the default avatar.

Steps to reproduce

On Gitlab CE 12.6.2

  • Go to the board (project or group)
  • click on an issue card assigned (to a user with an avatar)

Relevant logs and/or screenshots

Before clicking the card :
image

After clicking the card :
image