Summary card with large image only works after validating



I’m making a single-page application where it should be possible to share your “results” on twitter, in the form of a summary card with image.
I’m using a unique id in the form of a query string to seperate each result.

The problem is that the summary only appears after I run the entire url through the validator (for each result).
The validator doesn’t display any errors and says that my domain is whitelisted.

It might be a simple fix, but I would appreciate any input regarding this, as I’m all out of ideas my self.