Buit-in StatsforLoadTimes does not show All sheets

Hi,

I want to get load time performance of my reports, but StatsforLoadTimes page only shows some of sheet.

If I have report like below 

https://mytestserver.jp/#/site/mysite/views/myreport/sheet1

https://mytestserver.jp/#/site/mysite/views/myreport/sheet2

https://mytestserver.jp/#/site/mysite/views/myreport/sheet3

Only sheet1 is displayed on Statsforloadtimes

https://mytestserver.jp/#/site/mysite/analysis/StatsforLoadTimes

sheet2, and sheet3 does not appears on report and downloaded datasource

Is there any settings or conditions to get load time of all sheets on stats page? 

My tableau server version is 20202.20.0721.1350

Thanks

Satoshi