I have a project inheriting from another Master Template project.
I created a custom theme (new-light) that begins with the light theme and just defines some company colors. I am setting the session theme to be this new theme at startup. In the designer, when I open the Master Template project, I see all the colors defined in this new theme correctly applied in the screen; but in the inherited project, I do not.
Have you confirmed that the session theme is actually your custom one in the client? Does it work in the designer?
If you open dev tools in the client, can you see your custom theme styling in there? Are they in there but crossed out?
The right colors are displayed once I launch a session in the browser. The issue is only when I open the child project in the Designer
Not having this issue anymore. I think it was an issue with migrating my css styles from 8.1