Some area buttons cannot be clicked

I am making a very simple scene, the scene only contains Camera, EventSystem, Canvas, there is a Button under Canvas, Button is full of Canvas，Buttons can be clicked under the editor, all fields can be。After packaging the exe，My monitor resolution is 4K (3840*1080), open the exe and set the resolution to 2560*1080，There are some areas on the right that cannot be clicked, about 20%，Then set the program resolution to 3840*1080, all areas can be clicked。Next, I set a custom resolution with the graphics card, set it to 2560*1080, and set the display resolution to 2560*1080. After opening the program, you can also click in all areas.The version of unity I am using is Unity2021.3.8f1c1 and Unity2022.1.13f1c1。When I was at a loss, I installed unity2020.3.18f1c1. After packaging, the resolution was set to 2560*1080, and all areas could be clicked.

 

I have found the cause of the problem，The picture is the GraphicRaycaster script comparison between unity 2021.3.8 and unity 2020.3.18 UGUI

 

Yeah the latest 2021.3.6+ versions have broken raycasters or at least changed how they worked enough old UIs don't work.

There's many threads complaining about this.