When typing an email and editing the content, all will go smoothly as though I was working in Word, and then suddenly all corrections in the middle of any content will overwrite whatever is typed next. I have to 'trick' the program by pressing enter and have blank space next to where I want to type and then go through a process of backspacing to reformat the text. This happens intermittently. It happens in no other program and I can find no option to prevent it.

Any suggestions greatly appreciated!