Same here on macOS 10.14.6 (Mojave) on an iMac (Retina 5K, 27 inch, 2017, 4,2 GHz Intel Core i7, 40 GB RAM). Quite often when I’m waking the iMac from sleep the small Enpass window (not the main application!) is showing up asking me to unlock like if I was visiting a website needing a password (which I don’t). The window is always showing were the mouse pointer is. The phenomenon suddenly appeared a couple of months ago. Since recently I’m using Safari version 14.0 (14610.1.28.1.9) but the problem occurred already with older versions of Safari.