[$250] Mark down - Multiline message containing heading & room mention becomes a single line message

[lanitochka17]

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Version Number: 9.1.22-1
Reproducible in staging?: Y
Reproducible in production?: N
If this was caught on HybridApp, is this reproducible on New Expensify Standalone?: Y
If this was caught during regression testing, add the test name, ID and link from TestRail: N/A
Email or phone of affected tester (no customers): applausetester+sdsoidsj@applause.expensifail.com
Issue reported by: Applause - Internal Team

Action Performed:

1. Go to staging.new.expensify.com
2. Go to chat.
3. Send the following multiline message with heading and room mention -

hey

#hey

Expected Result:

The sent message will be multiline message

Actual Result:

The multiline message containing heading and room mention becomes a single line message

Workaround:

Unknown

Platforms:

Select the officially supported platforms where the issue was reproduced:

• Android: Standalone
• Android: HybridApp
• Android: mWeb Chrome
• iOS: Standalone
• iOS: HybridApp
• iOS: mWeb Safari
• Windows: Chrome
• MacOS: Chrome / Safari
• MacOS: Desktop

Platforms Tested:

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

• Android: Standalone
• Android: HybridApp
• Android: mWeb Chrome
• iOS: Standalone
• iOS: HybridApp
• iOS: mWeb Safari
• Windows: Chrome
• MacOS: Chrome / Safari
• MacOS: Desktop

Bug6789233_1743536730149.20250402_034316.mp4

Screenshots/Videos

Add any screenshot/video evidence

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Upwork Automation - Do Not Edit

• Upwork Job URL: https://www.upwork.com/jobs/~021907174786745499765
• Upwork Job ID: 1907174786745499765
• Last Price Increase: 2025-04-01

Issue Owner

Current Issue Owner: @eh2077

[melvin-bot]

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

[melvin-bot]

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

[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]

Job added to Upwork: https://www.upwork.com/jobs/~021907174786745499765

[melvin-bot]

Triggered auto assignment to Contributor-plus team member for initial proposal review - @eh2077 (External)

[gijoe0295]

@neil-marcellini BE bug: AddComment API removes the mention-report tag in its response.