SERP - Sitelinks but not sitelinks and not clickable

[b.digi]

We have a rather large site.  On SERP,  a page is seeing snippet with top navigation links captured.  But they are not active links on SERP although on the live site they are. And there are 6 sitelinks showing up as well.  Has anyone experienced this before?  Thanks.

[KeriMorgret]

Could you attach a screenshot? I think that could help us understand better what you are seeing. Thanks!