Incorrect totals in table - bug

we have a dashboard with two tables

1.) summary - this is fine

2.) with a drill down - has a bug

As you can see in our first screen shot, the 2nd chart jumbles up the values so the totals don’t match between the two charts

However if I explore the table with the bug then back out to the dashboard, the problem is gone.

Does anyone know what is going on and how to fix this?