I use 2 keyboard layouts on my computer, Czech QWERTY and English US. When using eM Client, my Czech keyboard sometimes switches from QWERTY to QWERTZ, but I don’t even have this layout installed on my computer. It’s crazy because it’s set throughout the whole OS for all programs. Only switching the keyboard with the mouse to English and back to Czech QWERTY in the OS will help. No other program changes the keyboard to a layout that is not installed on the system, only this one.