Today I face weird issue related to current navigation. I am a Site collection administrator on one of site collection and also has full permission. For this site collection only, when I select "Show Sub Site" check box to show sub site in current navigation , no sub site is visible under the current navigation pane on Site Setting -> Navigation Page. I am not talking about Master page , sub sites are not visible in current navigation preview pane itself. When I select "Show Pages" it is working fine.
"Show Sub Site" feature is working fine on all other site collection. Same Master Page is applied on all site collections.
When i was moving up some navigation link in current navigation setting page, suddenly all links are disappeared. I don't know from where can pull these links in current navigation pane . Currently when I select show sub site option, blank pane will come as i didn't select "Show Sub Site" check box.
Please let me know any solution to get rid of this issue.