Ubuntu changes line itself while typing with the built-in Keyboard

Ubuntu community,

I have a really disgusting trouble while typing with built-in keyboard on Ubuntu 16.04.06 LTS, the problem is that (I do not know why)while I am typing the line changes or it just delete everything and a lot of weird things, I re-installed the software, update it and nothing worked.

Have you any idea? help please.

Best regards, Santiago