April 15, 2026, 8:18pm 1

Summary

In our Discourse instance, on the backups pages, an arrow intermittently disappears.
This appears to be a regression, as i didn’t notice it last year.

Environment

•	Discourse version: 2026.4.0-latest (9776b417b8)
•	Hosting: self-hosted
•	Custom theme: default

Steps to Reproduce

1.	Open the backups page
2.	Enable read-only
3.     start backup
4.	Press “Logs”
5.	Observe the small UI glitch

Expected Behavior

Consistent UI

Actual Behavior

The arrow deosn’t appear in the open tab.
It only appears after:
• Navigating out and back in of the Backups page

Video Reproduction

Notes / Observations

•	No custom plugins or themes that could interfere
•	Intermittant
•	Affects the Desktop Browser session, aswell as Safari PWA

this appears to be part of a wider range of bugs where command line output requires navigation out of and into Logs section to update.

Request

Could you please confirm whether there is a known regression affecting the backups page in builds since early last year, or advise on what subsystem to inspect (MessageBus, polling fallback, etc.)?

This looks like a “race condition” so I’m trying something else to detect when to show/hide the > breadcrumb separator.

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