Howto for missing line:
1:Veryveryverylongline 2:AAAA 3:BBBB 4:CCCC
Now again, type in line one until the linebreak starts, then remove content until the text fits into one line again. Then this is displayed:
1:Veryveryverylongline 2:AAAA 3:BBBB 3:BBBB
When going through the lines with the cursor, I even get this ( not the additonal line#4 without content):
1:Veryveryverylongline 2:AAAA 3:BBBB 4:CCCC 4: