Chat bug and game crashing after using / commands!

I am currently staff on a server and to do my job i need to use slash commands. But every 5 or so commands i type in crashes my game. Its became so easy to guess when my game would crash. A chat bug also popped up when i first updated to iOS 11 and has been here ever since, but when i go to type my type bar or what ever you call it hides behind my keyboard and i can never see what im typing. Its really annoying especially when i need to see what names i need to type.

Thanks for reading and please fix as soon as possible?🤷🏼‍♂️