- 
    Bug 
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    Resolution: Invalid
- 
    P2: Important 
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    None
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    5.15.8, 6.6
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    None
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    debian10
当主窗口处于显示状态时,向其中添加一个子窗口部件,然后再次调用显示,子窗口就无法显示了。但如果先隐藏主窗口,然后再显示它,子窗口部件就可以正常显示了
Google translated: When the main window is in the display state, add a sub-window widget to it, then call display again, and the sub-window will not be displayed.

