Some special characters are not displayed after impeller is turned on on iOS

[liulianshanzhu]

Steps to reproduce

1.Upgrade flutter version 3.19.0 to version 3.22.0
2.Turn on impeller rendering on ios
3.Display some special characters in text, such as 🇭​​🇦​​🇲​🇺​​🇩​​🇦​

Expected results

Expected to be able to display all characters on iOS phones

Actual results

None of these characters are displayed

Code sample

Code sample

 Text('🇺🇩🇦𝄞⃝🇩ᬼ')

Screenshots or Video

Screenshots / Video demonstration

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Logs

Logs

[Paste your logs here]

Flutter Doctor output

Doctor output

[✓] Flutter (Channel master, 3.22.0, on macOS 14.1 23B2073 darwin-arm64)
[✓] Xcode - develop for iOS and macOS (Xcode 15.3)
[✓] Network resources

[danagbemava-nc]

Hi @liulianshanzhu, can you share screenshots of what the text is supposed to look like? What did it look like on 3.19.0 and what does it look like on 3.22.0?

[github-actions]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now.
If you find this problem please file a new issue with the same description, what happens, logs and the output of 'flutter doctor -v'. All system setups can be slightly different so it's always better to open new issues and reference the related ones.
Thanks for your contribution.