More please!! You dont give enough information. I cannot check anything.
So you posted this: https://www.ispotnature.org/communities/uk-and-ireland/view/observation/735237/wasp-nest-beetle-metoecus-paradoxus
And you wanted to do a search to find it.
On the old iSpot you could have done a dictionary search. Simple
https://www.ispotnature.org/species-dictionaries/uksi/metoecus%20paradoxus
but unless you know that it is coded NBNSYS0000024934 you could not do that on this new site. So you cannot just invoke
https://www.ispotnature.org/communities/uk-and-ireland/species-dictionary/NBNSYS0000024934/metoecus-paradoxus/observations
to discover that there are 10 observations for the species.
Now your search, should yield all 10. But the google search does not work very well.
The All tab finds 9 (but most of these are from the old iSpot - most are 404 page not found)
The ID tab only finds 1 (https://www.google.com/url?q=http://www.ispotnature.org/node/199785&sa=U&ved=0ahUKEwivlenluKXVAhWMIsAKHVxjAHkQFggFMAA&client=internal-uds-cse&usg=AFQjCNH93OeT2HwtI-cf0-mOzAKv0nHfFQ) - posted on the old site on 13 Aug 2011 and linking to the new site.
The taxonomy tab finds nothing
(dont expect anything in projects or users: and nothing shows up)
So!!! If nothing else your observation allows us to test the SEARCH on iSpot and find it nearly useless!
I wonder how it was expected to work?