Sometimes when you put in a word, but you spell it wrong, it acts like you were writing a different word and just adds to the end of it to make it a word. (For example, misspelling なかま as なまか and it turning into なまかじり、which is not a word I'm actually familiar with.
It's a little annoying, but it also feels like cheating. :(
That's crazy! I didn't know it was capable of that. Do you have any other examples of this happening? The more I have, the more it'll help to fix it :)