I doubt it's a temporary issue, more likely that it's something only affecting a subset of people. To know how big a subset, it needs more than a few people to check. It is clearly working 100% of the time for some people (including me), but that might just might mean it's isolated to one browser, or operating system, country, or internet provider. Or, it might be some setting other than "SafeSearch" that people don't even realise is set. Checking in an incognito window strips away all the history and choices you might have made in the past, and you see what a clean, anonymous user would see when searching.
I'm not especially worried right now because it seems to be a tiny number of users, but the more interesting reports are from the people who are experiencing it, even if they only find it on one browser or search engine. Searching on any browser in any search engine for any variation of "gromets plaza", "gromet plaza" or "gromet's plaza" should bring up the main grometsplaza.net site, or at the very least (Bing "gromet plaza" I'm looking at you), a Plaza site like maidbots.net. If you can find a case where it doesn't, that's interesting. Doubly so if that case still happens even in incognito mode, because that means that particular browser, operating system, country, ISP is changing the results to something different to what everyone else sees.