I’ve also tried setting Parameter 17 - LED Indicator Timeout to zero as someone suggested in this post.
It’s documented as:
To adjust the time that the LED Bar displays the value of what your Blue Series 2-1 Switch is at (ie: on/off, dim level), you would select Parameter 17 within your hub and then input a range of 0-11, where zero (0) equals always off, each interval equals one second and 11 equals always on.
But it appears that the effect is to momentarily switch away from the notification and show the state of the load. It seems a bit like that maybe should be considered a bug to me based on how it’s documented.