bug(Stroked Button): white space between the opacity layer and the outline using the outlined-container-shape token

[izubiaCocha]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

I'm currently using a button-override with an outlined-container-shape set to 8px. It appears that the border-radius of the outline is smaller than that of the state's opacity layer. This is causing a white space to appear in the corners of the button, between the outline and the opacity layer.

Reproduction

StackBlitz link: I'm having trouble with the "Installing dependencies" step
Steps to reproduce:

1. angular cli 19.0.7
2. ng new any-name
3. ng add @angular/material (blue theme, sass)
4. Add some mat-stroked-button
5. html { @include mat.button-overrides((outlined-container-shape: 8px)); }

Expected Behavior

The opacity layer should fully cover the hole within the outline, in the hover, active and pressed states.

Actual Behavior

the opacity layer is smaller, leaving visible white gaps.

Environment

• Angular: 19.0.6
• CDK/Material: 19.0.5
• Browser(s): chrome /safari
• Operating System (e.g. Windows, macOS, Ubuntu): macOS