Board Thread:Support Requests - Getting Technical/@comment-28596735-20180812191532/@comment-1038387-20180812220210

That's how subpages work, that's what subpages are. If there's no slash in there, it's not technically a subpage. Just a page you declare related.

Breadcrumbs is also usually something else, it's a row of the last 4-5 pages visited. IIRC, it came in a more recent MediaWiki so is not available on FANDOM.