drag and drop questions in a QS to delete other questions
This bug only occurs with questions set in the builder.
When you drag and drop a question in a QS, it's added in position 1. If you move it outside the QS, there's no problem (normal behavior). It seems that you can't insert a question between 2 non-goupe and non-page questions in a QS. But in my case, I've managed to insert it in a position other than 1 with an existing Group in the QS. And in this case, when I move my inserted question outside the QS or in an other level, the QS question in position 1 in my level is deleted.