This is not a new bug, but one I've been meaning to report for a while. Let's call it the "contractions bug."
Inputting a word with a contraction such as "don't" or "aren't" is not accepted by the system. After the ' mark, the rest of the sentence will be truncated.
So, number three under CHOICE: "Frankly, my dear, I dont give a damn" must be written to be accepted.
I'm an English teacher, so if someone takes my test, they'll think I'm a bad teacher for misspelling "don't"
I hope that the great ProProfs team will look into this bug.