I'm using the Microsoft.ReportViewer library in a VB-Net application to generate rdlc reports. The font has been specifically created for the company. Since migrating to Windows 11, I've encountered a display issue with the thousands separator when using the fr-CH culture (assigned to the "Language" property of the report). Instead of a space, a black square with a question mark inside () appears. The field format is "#,##0". I should mention that I do not have this issue with the "Arial" font, for example.

To summarize, with the de-CH culture, the thousands separator displays correctly. It is an apostrophe (’) (e28099 in HEX)(.htm). For the fr-CH culture, up until Windows 10, the thousands separator was a space (although normally, the fr-CH culture should also display an apostrophe. It's specific to microsoft !?). Since Windows 11, this strange symbol appears.

Has anyone encountered this issue before? The company that created the font does not have a solution at the moment.