I am working with Itellij IDEA (2017.2.4). I am not sure whether the reason is new version of IDEA, but I started to face it after new version installed.
When I type some code in editor and Tooltip is shown (it can be inspection or just parameters of method shown ect.) I cannot type new symbols until pressing ESCAPE button, it is not useful for me. Before updating the IDEA there was behavior when user types new code, tooltip is hidden without ESCAPE pressing. It was made hidden by any key pressed.
Actually maybe I just change some setting property unconsciously, if yes - what is the property needed to be restored to default?
How to make it hidden not by ESCAPE but by any button?
In next image I pictured the moment when only ESCAPE key can be pressed.
Check Tooltip initial delay(ms) option under Appearance in Idea settings.