Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:184.108.40.206.
Your query was changed from:
parsed.tbs_noct_fingerprint: 7cbbf489883ce643f5d67bb31d0a8750c736fc7ce3d4763def99a943446f2952 and precert: true
parsed.tbs_noct_fingerprint: 7cbbf489883ce643f5d67bb31d0a8750c736fc7ce3d4763def99a943446f2952 AND precert: true
If this isn't what you intended, you can run your raw query without expansion.