Unicode character breaks email template editor

[zakdma]

Preconditions and environment

• Latest Magento version

Steps to reproduce

1. Go to admin area.
2. Open Marketing/Communications/Email Templates list
3. Click Add New Template button on the top-right corner
4. See email template editor opened
5. Select Magento_Sales/New Order template as a value for Template form field
6. Click Load Template button
7. Enter any name to Template Name field
8. Add unicode symbol U+1F447 (👇) at any place in Template Content editor. Screenshot: https://prnt.sc/bDnJ5BzxSQTM
9. Click Save Template button to save template
10. Open the saved template again to edit

Expected result

Template Content field contains all template text as saved previously

Actual result

Template Content field contains text only prior to the inserted unicode character 👇 All further text is truncated Screenshot: https://prnt.sc/zF5HOkJokwDj

Additional information

No response

Release note

No response

Triage and priority

• [X] Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• [ ] Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• [ ] Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• [ ] Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

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[engcom-Bravo]

Hi @zakdma,

Thanks for your reporting and collaboration.

We have verified the issue in Latest 2.4-develop instance and the issue is reproducible.Kindly refer the screenshots.

Template Content field contains text only prior to the inserted unicode character 👇 All further text is truncated.

Hence Confirming the issue.

Thanks.

[github-jira-sync-bot]

:white_check_mark: Jira issue https://jira.corp.adobe.com/browse/AC-13040 is successfully created for this GitHub issue.

[m2-assistant[bot]]

:white_check_mark: Confirmed by @engcom-Bravo. Thank you for verifying the issue.
Issue Available: @engcom-Bravo, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[hostep]

Would https://github.com/magento/magento2/pull/35174 fix this?

[zakdma]

@magento give me 2.4-develop instance

[zakdma]

Would #35174 fix this?

I don't think so. I tried manually changing the collation for the table and its fields, but it still doesn't work. It stopped trimming strings by such symbols but replaced them with ???? instead.