I have created a custom version of the default UWP button control template, which simply modifies the color scheme of the disabled state.
In a test project this customization is applied correctly, but in my real project it is ignored (although other custom control templates are applied correctly).
I have searched the project for TargetType="Button", hoping to discover something else that is overriding or interfering with this custom template, but there is nothing unusual; just a few style definitions that are setting properties for specific button instances.
Can anyone suggest why a custom UWP control template would be ignored or how I can debug what's causing this?