Lyric overload/psychotic autocorrect

I'm entering lyrics to a four-part choral piece. Lyric one is an English verse; lyric two is a Latin verse. With either language, after about five measures everything freezes and I have to go back to selecting the note and beginning the lyric process again. Once this starts, the AutoCorrect on my iPad loses its mind, and begins strange substitutions such as "prom" for "from," "twin" for "this," etc. At this point I have to close the program and start over. Am I doing something wrong, or do I just have to put up with this?