The issue link in github:
Kibana version: 6.1.0 and 6.3.0
Elasticsearch version: 6.1.0
Server OS version: Ubuntu 16.04.4
Browser version: Firefox 52.9.0
Browser OS version: MAC
Describe the bug: The Table can't have an order by column when use the serial diff aggregation . And if I sort the serial diff table by clicking the column title, it doesn't work, and this table will be disappear when the page refresh.
Steps to reproduce: just like the Screenshots
Expected behavior: the - value should be 0 or disappear, so that I can order the table by this column.
