How should i understanding "Total Throughput"

Hello Guys,
I am a little confuse about “Total Throughput” part.
In the transactions per second chart of Jmeter, it shows there has transactions at 15:19:13.
But the “Total Throughput” shows, there doesn`t has data at the moment.
In my options, there should has transactions if threads are activity.
Could anyone help to figure it out why no data in the “Total Throughput”, what am i thinking incorrect?
Thank you all, having a nice day!!!