MacBook Pro cursor jumps while typing

Hello,

I notice that at random, intermittent times (such as when I am being coaxed into an update), my cursor suddenly jumps to another position in the document such as a different paragraph, or when I am typing in messenger, between text message conversations. You can imagine this is incredibly frustrating. Do not tell me it is because my hands are hitting the trackpad, because it is not a persistent problem and only occurs intermittently. It also occurs when I specifically take care to keep any part of my hands off the machine besides the keys.