alt tab within vm passes alt tab to windows 10

[Trent]

If I press my host key combination to switch to seamless mode, but click cancel, alt-tab no longer works within my linux vm, it is instead sent to Windows 10, and the task switcher in Windows 10 comes up. The only way of making it work again is to switch to seamless mode and back to the normal mode. Once that's done, the alt-tab is then working within the linux vm.