Description of problem:
runQuery currently fails to return info for some bugs.  This works:

DEBUG: Bugzilla RPC call: bugzilla.runQuery, arguments:
DEBUG: $VAR1 = {
DEBUG:   'bug_id' => '823474'
DEBUG: };

and returns bug info while the same for other bug (that is public, so there should be no permissions issue, this was tried over authenticated connection too):

DEBUG: Bugzilla RPC call: bugzilla.runQuery, arguments:
DEBUG: $VAR1 = {
DEBUG:   'bug_id' => '807252'
DEBUG: };

returns no result:

DEBUG:   ],
DEBUG:   'bugs' => []
DEBUG: };

This was reportedly introduced by BZ update earlier today.