Excel-DNA / Excel-DNA/ExcelDna
WinForms focus issue in .NET 9
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- C#
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Description
We have an issue when we create a WinForms form from the ribbon.
It works fine in .NET 4.8, 6.0 and 8.0:

but does not in 9.0, it types in the Excel spreadsheet below the form:

We have no idea how to debug this. Do you think it's an issue with .NET?
See this code to be able to reproduce: https://github.com/jewicht/ExcelDNA-Samples/tree/add-form-to-ribbon-example (Ribbon.sln is modified to show a form with a textbox.)
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