I'm currently writing Glasgow Smile's story and I noticed something odd: the word 'expression' doesn't seem to show up. When I wrote 'an expression of satisfaction' in the eighth paragraph it shows on the profile as 'an of satisfaction'. I don't why this is happening but I don't know if it's a bug, so I thought that I'd better ask here. I have a hunch it's got something to do with coding languages and so forth, but I don't know. Is my hunch correct?

so, what actually is the security reason? is it used in, like, malicious code or something?