I’ve read the patch notes over and over, but I see nothing about this, but it seems the slow effect from her turrets has been changed, 2 turrets slow you to a crawl and 3 actually root you and make you unable to move.
I’ve only encountered this while playing as D.Va so it’s possible this is only specific to this interaction.
I don’t remember ever being rooted by turrets before the last few days and now it’s happening all the time.
I suspect that previously the slow didn’t stack from multiple turrets and now it does?