project.config overrides don't always work

[vip32]

when using the following project.config.ts the PORT override is not used. after using npm start the site is still being served on port 5555. however the overridden APP_TITLE works fine.
Other override like PROD_DEST also are ignored. Changing the values directly in seed.config.ts is gives the desired result and the changes are applied (start or build.prod tasks).

is this a bug or am i overlooking something?

export class ProjectConfig extends SeedConfig {

  PROJECT_TASKS_DIR = join(process.cwd(), this.TOOLS_DIR, 'tasks', 'project');

  constructor() {
    super();
    this.APP_TITLE = 'Event|Feedback2';
    this.PORT = 1133;

[mgechev]

Seems like duplicate of #823 which is solved by #968.