Installers based on InnoSetup use invisible window owning the main installer window. When focus is given to the installer window popup, window managers sometimes do not raise it as their owner is invisible and it stays below other windows unless they are minimized.
Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=49933
This is not a regression and it is arguably perhaps a window manager bug, but it is also extremely annoying for users as installer windows tend to disappear from the pager, as well as missing from the window selector and below all other windows.