Chat - Markdown with code block is shown with box in preview

[lanitochka17]

If you haven’t already, check out our contributing guidelines for onboarding and email contributors@expensify.com to request to join our Slack channel!

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Version Number: 9.1.98-2
Reproducible in staging?: Y
Reproducible in production?: N
If this was caught during regression testing, add the test name, ID and link from TestRail: N/A
Issue reported by: Applause - internal Team

Action Performed:

1. Go to https://staging.new.expensify.com/home
2. Open a chat
3. Paste the text -
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Expected Result:

Markdown with code block must not be shown with box in preview

Actual Result:

Markdown with code block is shown with box in preview

Workaround:

Unknown

Platforms:

Select the officially supported platforms where the issue was reproduced:

• Android: App
• Android: mWeb Chrome
• iOS: App
• iOS: mWeb Safari
• iOS: mWeb Chrome
• Windows: Chrome
• MacOS: Chrome / Safari
• MacOS: Desktop

Platforms Tested:

On which of our officially supported platforms was this issue tested:

• Android: App
• Android: mWeb Chrome
• iOS: App
• iOS: mWeb Safari
• iOS: mWeb Chrome
• Windows: Chrome
• MacOS: Chrome / Safari
• MacOS: Desktop

Screenshots/Videos

Add any screenshot/video evidence

Bug6924609_1755934726726.Screenrecorder-2025-08-23-13-03-13-555.mp4

View all open jobs on GitHub

[melvin-bot]

Triggered auto assignment to @JmillsExpensify (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details. Please add this bug to a GH project, as outlined in the SO.

[melvin-bot]

Triggered auto assignment to @JS00001 (DeployBlockerCash), see https://stackoverflowteams.com/c/expensify/questions/9980/ for more details.

[github-actions]

👋 Friendly reminder that deploy blockers are time-sensitive ⏱ issues! Check out the open `StagingDeployCash` deploy checklist to see the list of PRs included in this release, then work quickly to do one of the following:

1. Identify the pull request that introduced this issue and revert it.
2. Find someone who can quickly fix the issue.
3. Fix the issue yourself.

[melvin-bot]

💬 A slack conversation has been started in #expensify-open-source

[lanitochka17]

Production:

0-02-01-9d12a469f582e007a67f0f7e4c88ca13ab90f77d84018e78a614d53f605340a1_9acfef8d03b7066c.1.mp4