Here’s what I suspect: In my opinion, this happens because hydration is not occurring properly. That’s why the related components are rendered using CSR. You’ll likely need to make some adjustments. it is not about lazy loading.

Why do I think this?

1. When I converted a CSR project to SSR, I had no issues with lazy-loaded routes.
2. The Angular Hybrid Rendering guide doesn’t mention eager or lazy-loaded routes as a specific issue.

What you should check:

1. https://angular.dev/guide/hydration
2. https://sap.github.io/spartacus-docs/server-side-rendering-coding-guidelines/