Censys expands queries to provide additional functionality. For example, the query a:zmap.io
executes a DNS lookup and expands to ip:220.127.116.11.
Your query was changed from:
parsed.tbs_noct_fingerprint: eb96821ab536bbf83df987c054c41028fca5cb463d3e5160ceb9dd560170b895 and precert: true
parsed.tbs_noct_fingerprint: eb96821ab536bbf83df987c054c41028fca5cb463d3e5160ceb9dd560170b895 AND precert: true
If this isn't what you intended, you can run your raw query without expansion.