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: 0f8272e33edef029a8ce97fae947a3ee6e346ced4a307b7fac0b09045285447a and precert: true
parsed.tbs_noct_fingerprint: 0f8272e33edef029a8ce97fae947a3ee6e346ced4a307b7fac0b09045285447a AND precert: true
If this isn't what you intended, you can run your raw query without expansion.