[$500] When scrolling backwards the messages with longer chats stuck and need to scroll forward

[m-natarajan]

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Version Number: 1.3.95-5
Reproducible in staging?: y
Reproducible in production?: y
If this was caught during regression testing, add the test name, ID and link from TestRail:
Email or phone of affected tester (no customers):
Logs: https://stackoverflow.com/c/expensify/questions/4856
Expensify/Expensify Issue URL:
Issue reported by: @quinthar
Slack conversation: https://expensify.slack.com/archives/C049HHMV9SM/p1699164509427949

Action Performed:

1. Open a chat with long chats
2. Scroll backwards quickly

Expected Result:

Messages should load without stuck

Actual Result:

If I scroll backwards very quickly, it will get "stuck" -- and I need to scroll forward and then backwards again to get it to load the new page. I think it might be that it loads one previous page at a time, and if I scroll quickly enough to get to the top of that page's "skeleton" before it displays, then it doesn't register me being at the top of it. I need to scroll down to the "next" page, and then scroll back to the "previous" before it gets the one before. I would expect it should never get stuck while scrolling backwards.

Workaround:

unknown

Platforms:

Which of our officially supported platforms is this issue occurring on?

• Android: Native
• Android: mWeb Chrome
• iOS: Native
• iOS: mWeb Safari
• MacOS: Chrome / Safari
• MacOS: Desktop

Screenshots/Videos

Add any screenshot/video evidence

Recording.202.mp4

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[melvin-bot]

Job added to Upwork: https://www.upwork.com/jobs/~01dc47a9e2814684af

[melvin-bot]

Triggered auto assignment to @mallenexpensify (Bug), see https://stackoverflow.com/c/expensify/questions/14418 for more details.

[melvin-bot]

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[melvin-bot]

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

[melvin-bot]

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[MADahab]

Contributor details
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I had a similar issue but it was related to posts not chats but it might be the same idea if the reason is as u state that it loads one previous page at a time,
I came with a workaround that i had the first page that it is always rendered, and when ever the user scrolls down and load the next posts i add the new posts to the same page that is rendered.
In your case you can make state that has the first page or array of chats (depending on your Implementation) and when ever new chats load add them to this state, so now all chats are cached in the rendered state. and when scrolling back you wont need to reload them.
Hope it helps

[melvin-bot]

✅ Contributor details stored successfully. Thank you for contributing to Expensify!

[perunt]

👋🏻

[melvin-bot]

📣 @jjcoffee 🎉 An offer has been automatically sent to your Upwork account for the Reviewer role 🎉 Thanks for contributing to the Expensify app!

Offer link
Upwork job

[mallenexpensify]

As the assigned BZ, I'm going to 'hang tight' as this has been addressed and worked on before. Per the slack chat, @perunt has experience/knowledge here so I'll wait til they post and follow along.

[melvin-bot]

@mallenexpensify, @jjcoffee, @perunt Uh oh! This issue is overdue by 2 days. Don't forget to update your issues!

[melvin-bot]

@mallenexpensify, @jjcoffee, @perunt Uh oh! This issue is overdue by 2 days. Don't forget to update your issues!

[mallenexpensify]

@perunt is there plan here that you'll submit a proposal and @jjcoffee will review, like normal?

[mallenexpensify]

@perunt , can you provide an update please?

[perunt]

Hey there! Sorry for getting back to you late.
We've got a PR ready with the fix.
But there's still a bit more to look into, so we're going to keep digging into this.

[melvin-bot]

@mallenexpensify, @jjcoffee, @perunt Still overdue 6 days?! Let's take care of this!

[jjcoffee]

Unassigning since I don't think I'm needed here!

[melvin-bot]

@mallenexpensify @perunt this issue is now 3 weeks old. There is one more week left before this issue breaks WAQ and will need to go internal. What needs to happen to get a PR in review this week? Please create a thread in #expensify-open-source to discuss. Thanks!

[perunt]

It was resolved with #31288
can we close it?

[mallenexpensify]

I tested, it appears to be resolved. There are times where, when scrolling up fast, it lags for a moment before the chats populate, I think that's expected behaviour. @quinthar if you continue to encounter, please comment and reopen the GH.