I've used Confluence for several years. When I change the title of a page to something new and press Publish, that change is immediately reflected.
I'm now learning how to use Jira Service Desk. My sample project is called "JSD Test (for Demo Purposes)". When I first went to the connected Confluence page it naturally had the same title. So I changed it to "Welcome to the JSD Test Help Center". But when I pressed Publish, I was surprised to see the original title still there!
Might this be a bug in your software?
Robert