This problem has never occurred before but is started spontaneous.
After a search action the keyboard stays in Command Mode and the ESC-key does not toggle into EDIT-mode.
Editing is not possible, the cursor has changed into an underscore and closing the tab-page and re-opening seems to be the only solution.
The problem occurs suddenly (cannot recall to have changed anything) and is very annoying.
Update:
I have found the problem:
- ESC -> Command Mode
- i -> EDIT mode
Thx for your patience.