Hello! I'm not sure when this first came about, but as of the current patch, the augment for Nova's 2 in Conclave makes her mines invisible after a second or so of being deployed. Audio cue is still there, but with no visual cue they can be placed much more aggressively, such as in the middle of ongoing firefights.   Here's a quick recording to show the bug, sorry in advance for the keyboard noises (didn't realize it was open mic)! https://youtu.be/SdlyoJbOteE