The link doesn't seem to point to any existing post. Did it get removed?
KDE
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org/, check whether it has been reported.
If it hasn't, report it yourself.
PLEASE THINK CAREFULLY BEFORE POSTING HERE.
Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.
hole between window when you snap it side by side
Isn't it because corners are rounded, so even if you snap edges of 4 windows perfectly, their "corners" won't align because they are rounded?
Wouldn't it make more sense if the window stop being rounded when being snap just like full screen, because it's full screen when another window snap beside it but it leaving this hole instead
Maybe you should just disable rounded corners entirely if you want to avoid "holes" between windows?
It's not a bug, but a design choice in the Breeze theme. You can get rid of it by selecting this:
System Settings: Appearance & Style: Colors & Themes: Window Decorations: Plastik
(Or click Get New... and find another decoration set with angled corners.)