Does KDE Neon stable include the Plasma 5.27.2 plasmashell QML reference leak fix?

KDE Neon tracks KDE Plasma releases on an Ubuntu base, and the plasmashell QML engine has a documented reference retention issue affecting widget instances during virtual desktop changes.

The change that clears retained references to deleted widget instances is associated with Plasma 5.27.2. Because Neon is a rolling release with distinct stable and unstable tracks, the timing of when that change reaches the user edition is version dependent.

Residual memory growth is still reported with certain third-party widgets or custom QML components, leaving uncertainty about whether observed growth reflects core Plasma behavior or is widget specific. Memory measurements also vary with system load, graphics drivers and the exact widget set enabled.

Does the current KDE Neon stable edition ship a Plasma build containing the 5.27.2 reference cleanup? Which Plasma version numbers delimit pre-fix and post-fix Neon images? Can core plasmashell memory behavior be distinguished from widget-specific leaks in Neon without assuming a particular test environment?