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When letting the IDE perform a fix by inserting an import statement (in this case java.net.Socket), the text input cursor disappears. It's no longer possible to enter any code into the editor. It is possible to move around in the code with the mouse (line and column numbers at the bottom change when clicking), as well as making selection, but it's not possible to enter text or perform any actions via the keyboard.
Created attachment 35780 [details] The log file
It's duplicate of issue 65326. Unfortunatelly it's JDK bug. *** This issue has been marked as a duplicate of 65326 ***