Square flicker in x11 after playing(I have a 2560x1080 display and the square is 1920x1080 in center )

Operating System: Fedora Linux 39
KDE Plasma Version: 5.27.10
KDE Frameworks Version: 5.113.0
Qt Version: 5.15.12
Kernel Version: 6.6.14-200.fc39.x86_64 (64-bit)
Graphics Platform: X11
Processors: 16 × Intel® Core™ i7-10700KF CPU @ 3.80GHz
Memory: 15,5 GiB of RAM
Graphics Processor: NVIDIA GeForce RTX 3070/PCIe/SSE2
Manufacturer: ASUS
NVIDIA Driver Version: 545.29.06
NVML Version:12.545.29.06
Server Vendor Version: 1.20.14 (12014000)
NV-CONTROL Version: 1.29
When logging again it disappears.