Created attachment 173450 [details]
a few second video show the problem

Cursor is not visible in the graphical part of the screen although it is visible on the toolbar and menu bar.

It does become visible if I click left or right buttons.

Hardware is a raspberry pi 5.
This is from a fresh install and update, upgrade of raspberry pi OS 64 bit dated 2024-07-04.
Installed KStars using Nou's script (https://gitea.nouspiro.space/nou/astro-soft-build).
git clone https://gitea.nouspiro.space/nou/astro-soft-build.git
cd astro-soft-build
./install-dependencies.sh
Reboot
cd astro-soft-build
./build-soft-stable.sh
Reboot

STEPS TO REPRODUCE
1.  Open KStars from the menu
2.  move cursor diagonally (or other) across the KStars window

OBSERVED RESULT
mouse cursor disappears. 

SOFTWARE/OS VERSIONS

Linux/KDE Plasma:  Debian GNU/Linux 12 (bookworm)
KStars: Version 3.7.2 Stable
KDE Frameworks: Version 5.103.0
Qt: Version 5.15.8 (built against 5.15.8)

The wayland windowing system

The host name, the kernel version, the release date and the architecture.
uname -a
Linux Oak01 6.6.47+rpt-rpi-2712 #1 SMP PREEMPT Debian 1:6.6.47-1+rpt1 (2024-09-02) aarch64 GNU/Linux

ADDITIONAL INFORMATION
I have gone through the steps from scratch approximately 3 times. It's real.