When switching input between two different input devices, xorg-server will call CopyKeyClass function and SendNewKeyboardNotify event, this behavier cause client receive newKeyboardNotify.
In fact, xogr-server will send the xkbMapNotify event when switching the input, and the client will update the keymap after receiving the xkbMapNotify event.
this commit aim to solve this issue: #1214 (closed)