SUMMARY Rarely, but time after time when I wake my laptop from sleep I see desktop and opened application for a fraction of a second. I found a post on a blog (https://blog.martin-graesslin.com/blog/2015/01/locking-the-screen-before-system-suspends/) which describes a plan to overcome this problem, but as far as I can tell the problem still exists. It does not much harm but makes me feel sad about system's design.
As I recently discovered it is some kind of plague now. It happens on Linux Mint 19.3 and on GalliumOS 3.1 (xfce).
Possible duplicate of Bug 408493.
*** This bug has been marked as a duplicate of bug 408493 ***
*** This bug has been marked as a duplicate of bug 316734 ***