Issues added to a Project show as linked in the issue sidebar but never appear in any Project view

Summary

Issues added to my user-owned Project ("HME Bug Tracker") show the project and a Status value ("Triage") in the issue sidebar, but the item never appears in any view of the project, including a brand-new Table view with no filters. Only one project with this name exists on my account.

Environment

• Project: user-owned, private ("HME Bug Tracker"), created from the Bug tracker template
• Repository: pablodalvarezg/hmebugs (private)
• Browser: Chrome (also reproduced in an Incognito window with no extensions)
• Date observed: October 15, 2026

Steps to reproduce

1. Create an issue, either from the Project board ("+" in a column) or from the repository's Issues tab and then add it to the project from the issue sidebar.
2. The item briefly appears in the board right after creation.
3. Refresh the project page.

Expected behavior

The item stays visible in the project views, since the issue sidebar shows it as part of the project with Status = Triage.

Actual behavior

• The item disappears from all project views after refreshing, including a new Table view with no filters.
• The issue sidebar still shows the project and Status = Triage.
• Some add/remove actions are not recorded in the issue timeline. In one case, the last timeline event was "removed this from HME Bug Tracker" even though the sidebar showed the issue as added and I had re-added it afterwards.
• Removing the issue from the project and adding it again sometimes makes it appear, sometimes after several minutes, but not consistently.
• Some issues that were never manually removed/re-added never appeared in any view.

Additional observation

In the issue sidebar's "Select projects" dropdown, "HME Bug Tracker" is listed four times: under "Group selected" (checked), "Recent", "Repository", and "Organization" (all unchecked). There is only one project with this name on my account, so the checked state looks inconsistent with the actual project.

This happened only once and haven't been able to reproduce since.

You can see here that the project list is empty and without any filters applied to it.

However, the issue is created and seemingly assigned to the correct project and status:

What I already ruled out

• View filters: a new unfiltered Table view also doesn't show the items.
• Archived items: the missing items are not there.
• Workflows: all built-in workflows were disabled and the issue persists.
• Browser extensions/cache: reproduced in Incognito.
• Project configuration: I deleted and recreated the project, and the issue persists.

EDIT - Important:

Noticed that when unassigning and reassigning the issue to the project, after a few minutes, it successfully shows up on the views.