v12.5.1 - Screen customisation & Multi-currencies

Hello,
This is expected behavior for now.
The multi-currency management is only implemented on native amount/cost fields handled directly by ProjeQtOr. Custom fields created through the Screen Customization tool are currently stored as simple numeric values and are not linked to the currency conversion mechanism.We can study an evolution of the Screen Customization module to support multi-currency behavior on custom financial fields.
As this would require specific development work, this could be considered through a dedicated sponsorship or contribution request if this feature is important for your organization.

Have a nice day,