Yes, it is default behavior: if the learner did anything in the question (i.e. click the checkmark, move the item or select the input field), it is presumed that he/she is started to answer, therefore skipping is immediately disabled for this question.
Test with "all answers submit" is in fact another kind of test object - and it does not exist as for now. Perhaps we will implement it in newer versions, though.
If you did not restrict module navigation during the test, then you can leave the test at any step, then turn back to the first unanswered question as many times, as you need it. Data is stored in objectives anyway.
Yes, it is default behavior: if the learner did anything in the question (i.e. click the checkmark, move the item or select the input field), it is presumed that he/she is started to answer, therefore skipping is immediately disabled for this question.
Test with "all answers submit" is in fact another kind of test object - and it does not exist as for now. Perhaps we will implement it in newer versions, though.
If you did not restrict module navigation during the test, then you can leave the test at any step, then turn back to the first unanswered question as many times, as you need it. Data is stored in objectives anyway.