[BUG REPORT] - incorrect display of multi-screens

[Sefur]

Description

Thanks you for providing such a great wallpaper software, it's very useful for me.
I want to set a wallpaper for my two screens , but there are some thing wrong below: I have tow different size screen; the first one is my computer screen which has 16 inches, the second one is a 27 inch monitor. When I use the latest version(1.12) Auto Wall with mutil screen mode. No matter which screen I choose, the wallpaper display not full screen only on my 27 inch monitor
The environment of my computer is: 版本 Windows 11 家庭中文版 版本 23H2 安装日期 ‎2023/‎3/‎11 操作系统版本 22631.3296 体验 Windows Feature Experience Pack 1000.22687.1000.0 My configure is: 16 inch screen is main monitor, 27 inch screen extended display. The opposite configuration also yields the same result.
The display is:

Steps to reproduce

1. open the AutoWall.exe
2. choose the multi-screen mode
3. apply on screen1 or screen2, select an wallpaper and click Apply button

Expected behavior

when I apply on screen1 or screen2, the wallpaper should show in full screen and the right screen

Actual behavior

No matter which screen I apply, the wallpaper display not full size and only on my 27 inch monitor

Windows version

Windows 11

Confirmation

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