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.validation_level: OV && parsed.validity.end: [2021-12-08 TO *] && tags: trusted
to
parsed.validation_level: OV && parsed.validity.end: [2021-12-08 TO *] && tags: trusted
If this isn't what you intended, you can run your raw query without expansion.