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Incorrect pasting when copying some uppercase Cyrillic characters #10246

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opened 2026-01-31 02:16:20 +00:00 by claunia · 0 comments
claunia commented 2026-01-31 02:16:20 +00:00
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Originally created by @farag2 on GitHub (Aug 21, 2020).

Environment

Windows build number: 10.0.19041.0
Windows Terminal version (if applicable): 1.1.2233.0

Steps to reproduce

Some (not all) uppercase Cyrillic characters e.g. "А", "Б", "В" couldn't be pasted or typed in Windows Terminal. Also "Ы", "Я" could be pasted/typed.
I've discovered it when tried to paste

Start-Process -FilePath "$env:ProgramFiles\Mozilla Firefox\firefox.exe" -ArgumentList "-new-tab https://ru.wikipedia.org/wiki/Свободное_программное_обеспечение#Введение_ограничений_для_ПО"

Expected behavior

The string above should be pasted.

Actual behavior

Start-Process -FilePath "$env:ProgramFiles\Mozilla Firefox\firefox.exe" -ArgumentList "-new-tab https://ru.wikipedia.org/wiki/Свободное_программное_обеспечение#ведение_ограничений_для_"

As you can see Введение_ограничений_для_ПО became ведение_ограничений_для_ by cutting all uppercase characters.

Originally created by @farag2 on GitHub (Aug 21, 2020). <!-- 🚨🚨🚨🚨🚨🚨🚨🚨🚨🚨 I ACKNOWLEDGE THE FOLLOWING BEFORE PROCEEDING: 1. If I delete this entire template and go my own path, the core team may close my issue without further explanation or engagement. 2. If I list multiple bugs/concerns in this one issue, the core team may close my issue without further explanation or engagement. 3. If I write an issue that has many duplicates, the core team may close my issue without further explanation or engagement (and without necessarily spending time to find the exact duplicate ID number). 4. If I leave the title incomplete when filing the issue, the core team may close my issue without further explanation or engagement. 5. If I file something completely blank in the body, the core team may close my issue without further explanation or engagement. All good? Then proceed! --> <!-- This bug tracker is monitored by Windows Terminal development team and other technical folks. **Important: When reporting BSODs or security issues, DO NOT attach memory dumps, logs, or traces to Github issues**. Instead, send dumps/traces to secure@microsoft.com, referencing this GitHub issue. If this is an application crash, please also provide a Feedback Hub submission link so we can find your diagnostic data on the backend. Use the category "Apps > Windows Terminal (Preview)" and choose "Share My Feedback" after submission to get the link. Please use this form and describe your issue, concisely but precisely, with as much detail as possible. --> # Environment ```none Windows build number: 10.0.19041.0 Windows Terminal version (if applicable): 1.1.2233.0 ``` # Steps to reproduce Some (not all) uppercase Cyrillic characters e.g. "А", "Б", "В" couldn't be pasted or typed in Windows Terminal. Also "Ы", "Я" could be pasted/typed. I've discovered it when tried to paste ```powershell Start-Process -FilePath "$env:ProgramFiles\Mozilla Firefox\firefox.exe" -ArgumentList "-new-tab https://ru.wikipedia.org/wiki/Свободное_программное_обеспечение#Введение_ограничений_для_ПО" ``` # Expected behavior The string above should be pasted. # Actual behavior ```powershell Start-Process -FilePath "$env:ProgramFiles\Mozilla Firefox\firefox.exe" -ArgumentList "-new-tab https://ru.wikipedia.org/wiki/Свободное_программное_обеспечение#ведение_ограничений_для_" ``` As you can see ```Введение_ограничений_для_ПО``` became ```ведение_ограничений_для_``` by cutting all uppercase characters.
claunia added the Resolution-ExternalNeeds-Tag-Fix labels 2026-01-31 02:16:20 +00:00
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Reference: starred/terminal#10246
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