If an instructor is copying/pasting into the Markup text question creator, if the answers contains an extra paragraph break after each answer/distractor, it can cause the line with the extra break to be placed in the stem of the question and the answer/distractors to be included, but blank. The conventional question editor treats the questions as not having any answer/distractors.
The markup text had everything (and a subtle error).
The preview had the answers/distractors enumerated, but no choices.
The classic question editor has no answers/distractors.
Ulitmate the question is delivered all on one line, and students can't respond to it, as the answer/distractors are not offered when blank. \
Please see attachments for example.
Here are the two example markup texts: