[$250] [AWAITING CHECKLIST][Due for payment 2025-03-24] iOS - Chat - The mention suggestion list is slow to respond

[IuliiaHerets]

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Version Number: v9.0.82-3
Reproducible in staging?: Yes
Reproducible in production?: No
If this was caught on HybridApp, is this reproducible on New Expensify Standalone?: Yes, repro on both
If this was caught during regression testing, add the test name, ID and link from TestRail: https://expensify.testrail.io/index.php?/tests/view/5428982&group_by=cases:section_id&group_id=292106&group_order=asc
Issue reported by: Applause Internal Team
Device used: iPhone 13
App Component: Chat Report View

Action Performed:

1. Open the iOS Hybrid app
2. Navigate to the 1:1 DM or room chat
3. Send a message with a user mention

Expected Result:

The mention suggestion list is displayed after typing @

Actual Result:

The mention suggestion list is slow to respond

Workaround:

Unknown

Platforms:

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

Screenshots/Videos

Bug6709437_1736370013886.ScreenRecording_01-08-2025_15-44-52_1.mp4

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Issue Owner

Current Issue Owner: @

Upwork Automation - Do Not Edit

• Upwork Job URL: https://www.upwork.com/jobs/~021904230172310111816
• Upwork Job ID: 1904230172310111816
• Last Price Increase: 2025-03-24
• Automatic offers:
• DylanDylann | Contributor | 106649697

[melvin-bot]

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

[melvin-bot]

Triggered auto assignment to @garrettmknight (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]

💬 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.

[lakchote]

Could it be #54805?

[ikevin127]

I remember experiencing this issue myself specifically on iOS: Native when I was working on the mentioned PR, before applying the filtering logic and, noting that I was on a new account, meaning small suggestion list. I checked by replacing the added filtering here:

App/src/pages/home/report/ReportActionCompose/SuggestionMention.tsx

Lines 305 to 307 in 5fb81d6

	// on staging server, in specific cases (see issue) BE returns duplicated personalDetails
	// entries with the same `login` which we need to filter out
	return array.findIndex((arrayDetail) => arrayDetail?.login === detail?.login) === index;

with return true; as it was before the PR and the issue is still reproducible. I'm suspecting something related to reanimated given the recent react-native version upgrade, but nothing solid yet.