It does not block access to the area from the beginning, but waits until the page is loaded before blocking.
UPDATE: We implemented an instant loading script feature to help fix this.
Hey Mintso Team,
I apologize to hear you are having trouble. Naturally, Woosh uses Shopify's ScriptAPI to load our scripts after the page has loaded to prevent any loading delay for normal customers. Then it redirects unallowed users. If you would like us to make this completely pre-load for you, we could do that as well, by adding the script directly to your Shopify theme.
I will also send you an email regarding this.