When we have added 5 elements, after that if i want to add a new element between 4th and 5th Element then in this case it will not allow to drop element.
I have checked it on Your live preview also and same issue occur there also,
Could you provide me with video? Because I did not understand problem exactly
Please find attached video. You can also check this on live preview
Attached files: bal-editor-issue-1.mp4