If your browser window loses focus (by clicking on another tab / open program) whilst you have a key pressed then, on becoming focused again, the engine registers that the key is still pressed even if it is not. The problem becomes rectified after you press then release the same key again.
Attach a Capx
Description of Capx
The capx contains an object that can be moved left and right by holding down the arrow keys, using events.
Steps to Reproduce Bug
As per above.
When the layout's browser is in focus, all key-is-downs should be correctly sensed irrespective of their condition when the browser lost focus.
Operating System and Service Pack
Construct 2 Version ID
r206 64 bit
There's nothing we can do about this: for security reasons the browser does not send any keyboard events to the page when the window is not focused (obviously - otherwise every web page could be a keylogger). However since the page never gets a key up event it thinks the key is still down. I don't believe there is anything that can be done about this, so closing as won't fix.
Develop games in your browser. Powerful, performant & highly capable.
I guess a browser back in focus check will be required to negate this....