Merge Request error: Failed to get security report information.

Summary

Merge Request page show a error banner "Failed to get security report information. Please reload the page or try again later."
GitLab Omnubus 13.5.1-ce

Steps to reproduce

Create a Merge Request from any fork project.
Merge Requests in same project works fine.

Error details

Merge Request pages has a background API request, example:

/api/v4/projects/208/pipelines/85116/jobs

Project ID in this URI is wrong!
In my example 208 its a recipient project of Merge Request. Always.
85116 - its pipeline ID of a source project.

In case Merge Request from a fork, combination ID of a project-recipient and pipeline ID of a project-source always return 404 and i see "Failed to get security report information"