_mongoc_cse_client_enable_auto_encryption assigns the bypass_auto_encryption option (from mongoc_auto_encryption_opts_set_bypass_auto_encryption) after parsing all extra options (mongoc_auto_encryption_opts_set_extra).

Since _parse_extra() also assigns topology->mongocryptd_bypass_spawn when handling mongocryptdBypassSpawn, it stands to reason that the "mongocryptdBypassSpawn" extra option is never actually respected. Even if the extra option was specified and mongoc_auto_encryption_opts_set_bypass_auto_encryption was never called, the default value for the first-class option will overwrite anything that _parse_extra assigns.