Stable should mean that it runs stable, runs without crashing. In most Linux distros though, stable means “not changing”. That is not the same thing.
So, Debian Stable can ship software with a design problem that makes it prone to crashing. That problem can be solved in a newer version (more stable) but Debian will continue to ship the older version (the crashy one) because that is what stable means to Debian.
A good example is that Debian Trixie is about to ship with NVIDIA drivers from a year ago that have problems with Wayland. There are newer drivers that work better. But Debian will ship the old ones.
Static and stable are not the same thing.