When performing a search in Confluence, if there's a question mark connected to a word, that word will not properly be searched. This issue does not happen with a period or an exclamation point.
This issue does not occur on the "Pages" quick search, but only if you click through to the actual full search page.
I noticed this issue because of the Jira Service Desk Widget where users are encouraged to ask a question and may include a question mark. I traced the actual issue to the confluence dosearchsite.action page.
To reproduce this, pick any word that exists in your wiki and try the following searches:
Also, Even if you don't connect the question mark to a word, it will still change the results because the question mark is treated as its own independent word. Try this search and see the difference: