There is a solution to this problem that can be enabled via regedit (https://github.com/microsoft/microsoft-ui-xaml/issues/1495#issuecomment-75568625...) once users update to Windows 11.
The issue is that for UWP apps like the start menu, Windows has its own xinput control and it can be disabled for Windows builds 21286 and higher, which reaches customers via Windows 11.