Why do changes to the Nios® V processor BSP settings disappear if the Platform Designer System is modified?

Description

Due to a problem in the Quartus® Prime Pro Edition Software version 21.3 and later, the unsaved Nios® V processor BSP settings are lost if the Platform Designer system is modified. 

Resolution

To work around this problem, save the Nios® V processor BSP settings before modifying the Platform Designer system.

This problem is scheduled to be resolved for a future version of the Quartus® Prime Pro Edition Software.