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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[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.

[lakchote]

Thanks for your quick answer @ikevin127!

[mountiny]

I cannot reproduce this and i should have many personal details locally

trim.E7E2CBF1-E520-4E26-AC60-69EC31039A5A.MOV

[mountiny]

As such i would recommend demoting this, we have not seen a report from internal user about this so maybe its specific to huge testing domain.

We should still investigate and find where this regression came from

[lakchote]

Asked if Margelo team is able to take on this issue here.

[hannojg]

yes, team Margelo will look into this. Someone from our team will soon comment for working on this, in the meantime feel free to assign this to me so it doesn't get lost!

A question to @IuliiaHerets : is this happening on all applause accounts? If not, can you please share the specific account email address that you can reproduce this with? (We will try to use the same account for easier reproduction)

[lakchote]

Assigning to @hannojg in the meantime

[danstepanov]

Hey I am Dan from Margelo and would like to work on this issue 👋

[melvin-bot]

📣 @danstepanov! 📣
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