[HOLD for payment 2023-05-25] [$1000] IOS - Chat - Left edge of PDF is visible on the previous image when scrolling through images

[kbecciv]

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Action Performed:

1. Launch App and open any chat with several images and PDF
2. Tap on any image to open preview
3. Scroll through images

Expected Result:

Each preview has only one image, there are no fragments of neighboring images

Actual Result:

Some pixels of the left edge of PDF is visible on the previous image when scrolling through images

Workaround:

Unknown

Platforms:

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

• Android / native
• Android / Chrome
• iOS / native
• iOS / Safari
• MacOS / Chrome / Safari
• MacOS / Desktop

Version Number: 1.3.8.5

Reproducible in staging?: Yes

Reproducible in production?: yes

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

Notes/Photos/Videos: Any additional supporting documentation

Bug6036104_PDF-image-scrolling.1.mp4

Expensify/Expensify Issue URL:

Issue reported by: Applause - Internal Team

Slack conversation:

View all open jobs on GitHub

Upwork Automation - Do Not Edit

• Upwork Job URL: https://www.upwork.com/jobs/~017d54deaca793736b
• Upwork Job ID: 1653383081749323776
• Last Price Increase: 2023-05-02

[MelvinBot]

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

[MelvinBot]

Bug0 Triage Checklist (Main S/O)

• This "bug" occurs on a supported platform (ensure Platforms in OP are ✅)
• This bug is not a duplicate report (check E/App issues and #expensify-bugs)
  • If it is, comment with a link to the original report, close the issue and add any novel details to the original issue instead
• This bug is reproducible using the reproduction steps in the OP. S/O
  • If the reproduction steps are clear and you're unable to reproduce the bug, check with the reporter and QA first, then close the issue.
  • If the reproduction steps aren't clear and you determine the correct steps, please update the OP.
• This issue is filled out as thoroughly and clearly as possible
  • Pay special attention to the title, results, platforms where the bug occurs, and if the bug happens on staging/production.
• I have reviewed and subscribed to the linked Slack conversation to ensure Slack/Github stay in sync

[NicMendonca]

@kbecciv I can't reliably reproduce this.

When the next image is a larger, white background PDF, I notice it. But if its a smaller, image I don't. Any ideas?

[kbecciv]

Hello @NicMendonca! Looks like the preview sizes are calculated incorrectly and several pixels of the PDF are shown on the previous image at right.

[NicMendonca]

Okay! I think that makes sense. But yeah, I definitely see this when I scroll through PDFs on iOS

[MelvinBot]

Job added to Upwork: https://www.upwork.com/jobs/~017d54deaca793736b

[MelvinBot]

Current assignee @NicMendonca is eligible for the External assigner, not assigning anyone new.

[MelvinBot]

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