When defining a Custom Property and value for a single Business Application, the value is being unintentionally propagated across all Business Application objects instead of just the intended business application.
Aria Operations 8.18
The underlying code for handling custom properties have an error that is causing the global propagation behavior.
This issue is fixed in VMware Aria Operations 8.18.2.
For more details, Please refer this below article which covers the fixes made in VMware Aria Operations 8.18.2.
https://knowledge.broadcom.