The issue appeared after recent updates.
If I minimize the pycharm window to the task bar, when I click its icon on the taskbar, its icon state shows it's maximized but it's not brought to front as it should be. It is actually behind all the other maximized windows. One way to bring it to front again is to move the mouse away from its icon and back then the click will bring it to the front.
System: openSUSE Leap 15.0 KDE.