This page has three symbols with different "offset" inputs. The last line in the symbol is dynamic data fetched from a dummy API (https://jsonplaceholder.typicode.com/posts) using the "offset" input to select the post title.
We can check with the HTML API that the dynamic part of the symbol is missing from the response:
You can also see on the live page, with JS toggled off, that the dynamic part is not pre-rendered on Builder's server:
https://grouse-ideal-plum.builder.live/symbol-prerender?cachebust=true