Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:188.8.131.52.
Your query was changed from:
parsed.tbs_noct_fingerprint: fee3b38d0356939e050be590685338e850b887377105da70a8a20830d8c7b84a and precert: true
parsed.tbs_noct_fingerprint: fee3b38d0356939e050be590685338e850b887377105da70a8a20830d8c7b84a AND precert: true
If this isn't what you intended, you can run your raw query without expansion.