When creating a new host, a user first has the option to select a CR to deploy on, this triggers JS that serialize the form and make foreman talk to the CR infrastructure.

when selecting a HG, the form is again serialized and sent to foreman, and again foreman needs to render the whole form, which includes calling out to the CR provider.

this is also true for loc/org drop downs, but since they are done first, this is not an issue.