SeedProd maintenance mode doesn’t redirect properly

I’m designing a WordPress website for a small business and created a “maintenance mode” page via SeedProd. I made sure to save my design and hit the “Publish” switch under the SeedProd section of the toolbar. When I access the site from my computer or phone, I reach the half-built website’s landing page instead of the maintenance mode one. If I click any internal link on that page, I’m redirected to the correct maintenance mode page.

Does anyone know what I’m doing wrong or how I can fix it? It’s clearly unprofessional and embarrassing to leave a half-built website exposed like this.