Issue not mentionned in merge request

In we created an issue, then a branch and a merge request.
The issue activity says that the issue has been mentionned in the merge Request with it’s id and a link to the merge request. (see screenshot)

But once on the Merge Request screen I can’t see link back to the issue.
I have some mentions about the branch for instance, but no link to the issue.

Am I missing something ?
Is this a bug ?
How am I supposed from a given MR to go back to the originating issue ?

Thanks for your help,