[Bug] Designs stuck on loading after upload | Failure in browser_ui/3_create/design_management/add_design_content_spec.rb | Create Design Management user adds a design and annotates it

Summary

The design image is not being updated after it's been attached without reloading the page. It's stuck on loading. But if we update the page manually, the image shows up correctly. The issue was found due to E2E failures described below.

List of changes c4e80089...d9c3a744 between the last successful test run and the first failure. Tentatively !67844 (merged) might have caused it, see #338675 (comment 653229731) for further details.

Steps to reproduce

1. Upload design to the issue
2. Notice that image doesn't stop loading
3. Reload the page - design is shown correctly

Full description

Create Design Management user adds a design and annotates it

File path

./qa/specs/features/browser_ui/3_create/design_management/add_design_content_spec.rb

Stack trace

Failure/Error: issue.add_design(design)

QA::Support::Repeater::WaitExceededError:
  Page did not fully load. This could be due to an unending async request or loading icon.

First happened in https://gitlab.com/gitlab-org/gitlab-qa-mirror/-/jobs/1509104102.

Screenshot