Yes, this appears to be the issue @Airy linked to (a comment of mine in another topic) that apparently is becoming more and more prevalent. FWIW, it’s not KM’s fault, it’s the Apple API that is unreliable.
If you’re interested, I built a subroutine to position windows about a year and a half ago when I first encountered this issue that has been working well for me ever since. There are, of course, other methods available, but here’s a link to my subroutine if you’re interested in trying it out.