However, the second (and subsequent) notifications appears ok, as you can see when I re-type the same command again:
$ notify-send -u critical -t 0 "this is a title" "aaa aaa aaa bbb bbb bbb ccc ccc ccc ddd ddd ddd eee eee eee fff fff fff ggg ggg ggg hhh hhh hhh iii iii iii jjj jjj jjj"
Maybe the proportion is not correct, because it could be better if the notification bubble appears wider than now.
However, the second (and subsequent) notifications appears ok, as you can see when I re-type the same command again:
$ notify-send -u critical -t 0 "this is a title" "aaa aaa aaa bbb bbb bbb ccc ccc ccc ddd ddd ddd eee eee eee fff fff fff ggg ggg ggg hhh hhh hhh iii iii iii jjj jjj jjj"
Maybe the proportion is not correct, because it could be better if the notification bubble appears wider than now.