Ok, update. I literally went into settings and went into every single option there is and I think I finally found what's going on. If you go into settings, go into accessibility, and then go into "touch zoom" and turn it off. After doing that, I turned SwiftKey beta back on and for now, it looks like it is working without the screen going crazy. This seems to be the cause of the screen randomly zooming in when I was typing and entering crazy letters that I wasn't typing. I will alert SwiftKey of this and see what they say. Also, I'm curious as to see if anyone on here who hasn't had any issues with SwiftKey, has that touch zoom feature turned off already and just don't know it. And one more thing, was touch zoom on the phone before kit kat update? I wouldn't think it was because I've never had this problem ever. Anyways, hope this helps. It's a starting point