This doesn't really work for things that are already words like it's/its. I type the one i want, iOS “corrects” it to the wrong one, and even after I tap the on

This doesn't really work for things that are already words like it's/its. I type the one i want, iOS “corrects” it to the wrong one, and even after I tap the one I typed in the prediction bar? iOS still inserts its own suggestion again.