Sparkline not working in 7.2.6

Hi I am on version 7.1.6 and want to move to 7.2.6 but i have noticed that spark-lines don't work in the new version. Or am i missing something? This is the SPL index=mlc_live | table host _time| chart sparkline count by host | fields - count When i change from fast mode to verbose mode in SPL it works, but you cant save a search that way. Any help would be great.