Soft-log missing ViewState in addViewAt to fix Fabric mount crash

[lorretheboy]

Explanation of Change

Fixed Issues

$ #93833
PROPOSAL: #93833 (comment)

Tests

1. Sign in on an account with lots of reports/expenses (the longer the Search list, the better — removeClippedSubviews + recycling only kicks in with many off-screen rows).
2. Go to the Search tab → a report view (route /search, SearchReport).
3. Scroll fast up and down repeatedly so rows cross the clipping rect and get detached/recycled.
4. Rapidly expand and collapse report-group rows (the GroupChildrenContainer mount/unmount is the trigger) while scrolling.
5. Verify that no crash happens

• Verify that no errors appear in the JS console

Offline tests

QA Steps

1. Sign in on an account with lots of reports/expenses (the longer the Search list, the better — removeClippedSubviews + recycling only kicks in with many off-screen rows).
2. Go to the Search tab → a report view (route /search, SearchReport).
3. Scroll fast up and down repeatedly so rows cross the clipping rect and get detached/recycled.
4. Rapidly expand and collapse report-group rows (the GroupChildrenContainer mount/unmount is the trigger) while scrolling.
5. Verify that no crash happens

• Verify that no errors appear in the JS console

PR Author Checklist

• I linked the correct issue in the ### Fixed Issues section above
• I wrote clear testing steps that cover the changes made in this PR
  • I added steps for local testing in the Tests section
  • I added steps for the expected offline behavior in the Offline steps section
  • I added steps for Staging and/or Production testing in the QA steps section
  • I added steps to cover failure scenarios (i.e. verify an input displays the correct error message if the entered data is not correct)
  • I turned off my network connection and tested it while offline to ensure it matches the expected behavior (i.e. verify the default avatar icon is displayed if app is offline)
  • I tested this PR with a High Traffic account against the staging or production API to ensure there are no regressions (e.g. long loading states that impact usability).
• I included screenshots or videos for tests on all platforms
• I ran the tests on all platforms & verified they passed on:
  • Android: Native
  • Android: mWeb Chrome
  • iOS: Native
  • iOS: mWeb Safari
  • MacOS: Chrome / Safari
• I verified there are no console errors (if there's a console error not related to the PR, report it or open an issue for it to be fixed)
• I followed proper code patterns (see Reviewing the code)
  • I verified that any callback methods that were added or modified are named for what the method does and never what callback they handle (i.e. toggleReport and not onIconClick)
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  • I verified that any new or modified comments were clear, correct English, and explained "why" the code was doing something instead of only explaining "what" the code was doing.
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• If a new code pattern is added I verified it was agreed to be used by multiple Expensify engineers
• I followed the guidelines as stated in the Review Guidelines
• I tested other components that can be impacted by my changes (i.e. if the PR modifies a shared library or component like Avatar, I verified the components using Avatar are working as expected)
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  • A similar style doesn't already exist
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• I added unit tests for any new feature or bug fix in this PR to help automatically prevent regressions in this user flow.
• If the main branch was merged into this PR after a review, I tested again and verified the outcome was still expected according to the Test steps.

Screenshots/Videos

Android: Native

5.mov

Android: mWeb Chrome

4.mov

iOS: Native

3.mov

iOS: mWeb Safari

2.mov

MacOS: Chrome / Safari

1.mov

[github-actions]

⚠️ This PR is possibly changing native code and/or updating libraries, it may cause problems with HybridApp. Please check if any patch updates are required in the HybridApp repo and run an AdHoc build to verify that HybridApp will not break. Ask Contributor Plus for help if you are not sure how to handle this. ⚠️

[lorretheboy]

I implemented alternative solution for soft-logging the issue instead of crashing for safer way (I have tested the main solution and it works but since the issue happens quite rare so can't guarantee it fixes the issue 100%). Besides, soft-logging consists with how we handled on the rest of the App

[melvin-bot]

@eVoloshchak Please copy/paste the Reviewer Checklist from here into a new comment on this PR and complete it. If you have the K2 extension, you can simply click: [this button]