underline, bold, italic not working
This seems like it should be so simple, but I've been trying everything I can think of. The commands underline, bold and italic stopped working. When I press command + U (or + B or + I), a selected (highlighted in the blue that denotes selected) paragraph symbol appears. Then, when I start typing, the line I'm working on is deleted due to the paragraph being selected and the new text doesn't have the formatting I want, e.g. being underlined. It's super annoying. I can fix the issue by selecting the text after it's written and applying the formatting I want, but that is pretty slow. I'd love anyone's help or advice!
MacBook Air (13-inch Mid 2011), iOS 9.1, actually iOS 10.10.5