android. egui_wgpu::winit: No window - clearing all surfaces

[nikescar]

Describe the bug
Refocused activity doesn't find its window on winit, android.
I have app setting wallpaper of android background. after setting wallpaper with android foreground service, logcat is printing next error. app is freezing after this.

08-30 21:15:35.297 10605 10630 W BingtrayApp: egui_wgpu::winit: No window - clearing all surfaces

I have tried with foreground service and without it. the error is same.

To Reproduce
Steps to reproduce the behavior:

1. clone branch from https://github.com/nikescar/bingtray/tree/feat.eguibugreport
2. cd mobile && ./build.sh
3. adb install ./app/build/outputs/apk/debug/app-arm64-v8a-debug.apk
4. adb logcat -v time -s *:V > fullcat.log

Expected behavior
app should get refocus its previous states

Additional context
I have used egui 0.32 and android-activity, ndk-sys crates.
I have disabled persistent options might be related with it.