qml UI component loses its appearance in xcb platform
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I use docker to package my qml application, I always use the webgl platform and it works fine. I want to check if the program in docker works on xcb platform as well as on webgl platform.
This is the botton looks like in my host computer in xcb platform

This is the botton looks like in my docker in webgl platform

and this is the botton in my docker in xcb platform

The shape and appearance are lost. What may I miss when I install the xcb plugin ?