I will be messaging with a friend of mine. When I go to reply my messages will sometimes start typing vertical. An example is this:

E

x

a

m

p

l

e

But even if I try to put a space my message sends to my friends like this: Myexampleofhowthewritingis. Just wondering if this could be a bug or no?

It's because of the quotes. Everytime you reply, it quote the last message and make the writing space smaller. Remove everything next time you reply, and it will work fine.