Is Anyone facing black background issue in lock screen after cold boot. It is happening to me since August 2026.

After cold boot, Lock screen background is just black with weather widget and clock. First I thought it was a windows spotlight issue but it still happening even after fixing a single wallpaper for lock screen.
The frequency of this issue is moderate. Like 5 in 10 cold boot.
It started happening after a window update in august 2026. which somehow took 2hrs in restart based installation.
I thought my windows files were corrupted so I did DISM and SFC, after then also resintalled window from recovery (the one in which app, setting and files are not deleted; repair version). Yet it is still happening.

Can Anyone help?