I just used the Search Module on a solution.
(Done so for many years, but haven't used global elements that much)
I have one hidden page, where I have alot of paragraphs, which acts as appetizers/links to other pages.
These paragraphs are used to fill in empty spaces in the layout when needed.
But when I search the page, the module doesn't search in the global paragraphs placed on other pages.
If let's say that I have one paragraph, which has it's origin on my hidden page. This paragraph is then placed as a global element on two different pages. Then the Search module should show both pages where the paragraph is placed, and not the hidden one. Now it doesn't show anything at all.