I am having a problem with keystroke capture when running a guest in VirtualBox, or connecting to a remote computer using FreeRDP. Starting a couple of months ago, some keystrokes are being interpreted by both the local host and the remote or virtual system, instead of just being passed to the remote system.
For instance, if I press Meta-E, Dolphin starts on my computer and Windows Explorer starts on the remote / virtual Windows computer. If I press Alt-F4, it closes the active application on the remote / virtual Windows computer AND asks if I want to power off the virtual machine.
Any ideas how to diagnose and fix this issue?