https://bugs.winehq.org/show_bug.cgi?id=31983
--- Comment #18 from TOM l12436@yahoo.com.tw --- Created attachment 58019 --> https://bugs.winehq.org/attachment.cgi?id=58019 linked application in KDE
the another window is almost empty generated by this kind of program. If your window manager did not add title to all window, it is not visible at first glance. but It should be appear on alt+tab, which has a empty window with not preview.
in KDE, all the window will be appear, and could control by kwin. kwin will choose the window which first created as main window of the program, which will always be empty window. this cause lots of inconvenience behavior in KDE.
the text is type in Chinese, It normally glitch if you did not has font of locate relate to it.