Slack Update Breaks Accessibility in Simplified Layout Mode

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In this video, Darrell Hilliker (CPWA) demonstrates a critical accessibility regression in Slack version 4.47.69. While the new “Activity” view aims to consolidate messages and mentions for improved efficiency, it appears to be completely incompatible with Slack’s Simplified Layout Mode when using a screen reader.

Darrell walks through several standard navigation techniques—including keyboard shortcuts (Ctrl+Shift+3), the F6 key to move between regions, and Tab/Arrow key navigation—showing that none of these methods allow a JAWS user to access the actual message content within the Activity tab. Instead of displaying notifications, the screen reader merely reports “loading” or “blank,” effectively locking out users who rely on these specific settings to perform their professional duties.

Bug Report: Accessibility Regression in Slack Activity View

  • Priority: P1 (Critical / Blocker)
  • Status: Open
  • Affected Version: Slack 4.47.69 (Windows 11)
  • Assistive Tech: JAWS 2026
  • Configuration: Simplified Display Mode: ON

Title

New Activity View is Keyboard/Screen Reader Inaccessible in Simplified Display Mode.

Description

The newly introduced “Activity” tab fails to render or focus message content when “Simplified Display Mode” is enabled. This prevents screen reader users from reading mentions, DMs, or threads within the Activity view, creating a total task blocker for collaboration.

Steps to Reproduce

  1. Open Slack (v4.47.69) on Windows 11 with JAWS running.
  2. Ensure Simplified Display Mode is enabled in Slack settings.
  3. Use Ctrl+Shift+3 to navigate to the Activity tab.
  4. Attempt to navigate into the message list using Tab, Arrow Keys, or F6 to switch regions.
  5. Observe the screen reader output and focus behavior.

Actual Behavior

The Activity tab reports as “Loading” or “Blank.” Focus remains trapped on the “Breadcrumbs toolbar” (Activity and Workspace buttons) or “Notification Preferences.” There is no keyboard path to reach or read the actual list of notifications or messages.

Expected Behavior

When the Activity tab is focused, the message list should be populated and reachable via standard keyboard navigation (Tab or Arrow keys). Screen readers should announce the content of mentions, DMs, and threads as they do in the standard view.

Impact Statement

This is a task-blocking accessibility issue. Slack is a critical infrastructure tool for thousands of companies, educational institutions, and government agencies. By breaking compatibility with Simplified Display Mode, this update prevents blind and visually impaired professionals from participating in essential workplace communications, disrupting their ability to perform their jobs.