This is a extensively discussed reality of the HE team opting to avoid performance degrading "polling" to overcome the fact that many smart switch/dimmer manufactures have opted out of paying a royalty to the patent holder (lutron) for the use of their method of instant status reporting. ST got around this by polling each switch for status on a frequent basis.
You can use RM to do this too, but a read through this thread should guide you on the best practices.
