Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:141.212.120.90.
Your query was changed from:
((parsed.unknown_extensions.id: 2.23.140.3.1)) AND tags.raw: "trusted"
to
((parsed.unknown_extensions.id: 2.23.140.3.1)) AND tags.raw: "trusted"
If this isn't what you intended, you can run your raw query without expansion.