After configuring the Virtual mask in the web browser of Bosch CPP7.3 camera and afterwards going back to the Live view, the Virtual mask appears as Privacy mask and is not transparent
Other inappropriate behaviors have been noticed, such as:
This happens on the Bosch CPP7.3 cameras that have FW version older than v.7.86.0019
Upgrade your camera to Firmware version 7.86.
It has been released and it is available on the Download Store.