try to add following options to .vmoptions file, you can edit it by clicking in menu bar: Help / Edit Custom VM options

and adding following line

-Dawt.ime.disabled=true

this should help fixing freeze of UI in phpstorm and idea. By disabling processing of input information by Java Input Method Framework. By default it is done for compatibility with special keyboards and languages like Chinese and similar, so most likely you do not need it anyways.