I'll edit it to (for me). With working on an X11 desktop everyday, it felt like everyone has at least once experienced such an issue.

To be fair to swaylock, they actually fixed some of those issues, in contrast to kscreenlocker which are just ignoring most edge-case bugs, because it's nearly impossible to fix them.

It's still a fundamentally flawed design, because the system fails open when the locker crashes. So it seems Sway / Wayland actually didn't learn anything in this area, and suffers from exactly the same problem as X11 when it comes to the lockscreen.