Hi @west-bay-web,
Yes, for products of special types, the function of setting products to be hidden cannot be achieved since it must keep the products always visible for display.
With special product types created by our plugins like WPC Product Bundles, WPC Frequently Bought Together, WPC Grouped Products, WPC Composite Products, they always have an option to unlink the included items from its individual products.
Similarly, if customers have the exact permalinks to those products or have added products to the wishlist/ favorite, they can always click on that link to visit the single product pages.
So briefly, Product Timer can only hide products from search and shop archive page, not from linked products to special product types. The target of our plugin is to only hide the products to prevent products from being found in shop and search results only.
This is not an error in fucntionalities, but limit of this hiding function. Hence, I will mark this thread as Resolved.
Hope my explanation is clear enough. If you have further questions, feel free to ask.
Best regards.