Disparity between Flutter version for Theme definition; Defining Styles under Theme not working

[AidenTag]

Describe the bug When defining the app Theme, defining a theme under "Themes:", and putting Styles under that theme does not work, the styles are not reflected in the app, whereas if you define Styles on its own, the styles are reflected in the app.

To Reproduce Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior A clear and concise description of what you expected to happen.

Screenshots If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context Add any other context about the problem here.

[sagardspeed2]

@AidenTag Can you please add your desired YAML for theme here. So I can check that ?