Items are not counted.

t_shii

Click on the column and on the bottom right of the screen
Sometimes the number is displayed and sometimes it is not.

 

Reason for not showing:
"Your selection exceeds the amount of data that can be retrieved from the server"

 

You can implement a custom filter and display the number of cases,

It takes a lot of mounting man-hours and increases the capacity.

 

I hope you improve.