The amount of "x paying subscribers" in tab Custom Plans, does not change

Since we did a couple of tests with Dummy info and created dummy customers and connected them to a plan, the amount of “x paying subscribers” does not change when deleting the “customers”.

E.g. we have deleted all “dummy customers” but it still shows as we have paying subscribers for the plan(s).

At this moment the information shown is not reliable, when agency want to have a quick look of how many paying customer it has for specific plans.

Is it possible to deploy a fix for this?