Why Google Adwords Keyword Tool is Showing Untitled Page in Google SERP?

Did you notice, If you will search the query "Google Adwords Keyword Tool" in Google search engine then https://adwords.google.com/select/KeywordToolExternal is showing Untitled in Google search engines result pages.



But when you will open this page (https://adwords.google.com/select/KeywordToolExternal) then you can found title as Google Adwords: Keyword Tool.



Then why Google is showing Untitled result for this query. Did you think Google is updating any new algorithm or its any type of bug?