F# notebook overriding my local culture of "en-GB" to "en"

[kojo12228]

Describe the bug

F# notebook appears to set the global culture to "en", rather than my local "en-GB". This is causing parsing failures only in my F# notebook that I don't see if I run the code elsewhere. If I set the culture specifically to "en-GB", parsing works again.

In the screenshot at the bottom of the issue, I've showed the failed parse on the current culture, the successful parse on "en-GB" and outputted the current culture. No where else in my code have I attempted to set the global culture.

For completeness, the culture according to FSI:

> System.Globalization.CultureInfo.CurrentCulture;;
val it: System.Globalization.CultureInfo =
  en-GB {Calendar = System.Globalization.GregorianCalendar;
         CompareInfo = CompareInfo - en-GB;
         CultureTypes = SpecificCultures, InstalledWin32Cultures;
         DateTimeFormat = System.Globalization.DateTimeFormatInfo;
         DisplayName = "English (United Kingdom)";
         EnglishName = "English (United Kingdom)";
         IetfLanguageTag = "en-GB";
         IsNeutralCulture = false;
         IsReadOnly = true;
         KeyboardLayoutId = 2057;
         LCID = 2057;
         Name = "en-GB";
         NativeName = "English (United Kingdom)";
         NumberFormat = System.Globalization.NumberFormatInfo;
         OptionalCalendars = [|System.Globalization.GregorianCalendar|];
         Parent = en;
         TextInfo = TextInfo - en-GB;
         ThreeLetterISOLanguageName = "eng";
         ThreeLetterWindowsLanguageName = "ENG";
         TwoLetterISOLanguageName = "en";
         UseUserOverride = true;}

Please complete the following:

Which version of .NET Interactive are you using? (In a notebook, run the #!about magic command. ):

Version: 1.0.440301+8915ad98609cad23d5d81765041c2a895afb4782
Library version: 1.0.0-beta.23403.1+8915ad98609cad23d5d81765041c2a895afb4782
Build date: 2023-09-02T06:55:32.4074034Z

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Screenshots

[WillFa]

Same thing happens to me with Powershell as the default language. It isn't specific to F#.

Changing my scripts to:
[float]::Parse($Matches[2], 383, (Get-Culture -Name en-US).NumberFormat)

Stops the errors, but the Notebook's output reverts back to Culture 9.

(That's not a $ for the currency symbol)