in some of our apps we have the problem that the keyboard input on Windows 10 is delayed (iskeydown) which makes the game possible to play. If you press a key it will be transmitted sometimes about 2 seconds after you hit it. If you hit a key just for a tenth of a second iskeyup will also be called after a few seconds (sometimes).
What makes it even more strange is that it doesn´t happen all the time. Sometimes it works and on some machines it works always.
Did anybody see that problem before and know what can be done against it?