The two most common Logitech keyboards are mechanical and membrane, with the primary difference being how the key activates the signal that is sent to your computer.
With membrane, the activation is made between the membrane surface and circuit board and these keyboards can be susceptible to ghosting. When certain multiple keys (usually three or more*) are pressed simultaneously, not all of the keystrokes will appear and one or more may disappear ( ghosted).
An example would be if you would type XML very rapidly but don’t release the X key before pressing the M key and subsequently press the L key, then only X and L would appear.
Logitech Signature K650, Craft, MX Keys, and the K860 are membrane keyboards and may experience ghosting. If this is a concern we would recommend to try a mechanical keyboard instead.
*Pressing two modifier keys (Left Ctrl, Right Ctrl, Left Alt, Right Alt, Left Shift, Right Shift and Left Win) together with one regular key should still work as expected.