Most likely the file system permissions changed so it fails to touch the cache dependency file to clear the site map cache therefore it does not appear. I would try deleting all the files under /Data/Sites/[SiteID]/systemfiles
but also please note that urls like you have posted with extra / segments in them are not supported by mojoPortal as discussed here. If that works for you ok, but one day it may cause a problem and my answer will be the same, it is not supported to use urls like that.
Best,
Joe