embedding shortcode in custom HTML

I’m struggling to embed a snippet shortcode in a custom HTML block. The snippet doesn’t resolve correctly. I’m using code snippets to retrieve latitude and longitude coordinates through a RESTapi and use these to create a Google Maps display. When I add a shortcode to a dedicated Shortcode block it resolves without issues (you can see that on the above webpage, below the Google Maps custom html block). What is the right process of including a snippet inside a custom html block?

• This topic was modified 3 years, 3 months ago by marcvl64. Reason: User error. It works as expected

The page I need help with: [log in to see the link]