in this demo http://jsfiddle.net/pc6qey01/ when handsontable column type is the first column then it shows just one column in the dropdown. If I move the column on the second place it shows all columns in the dropdown.
[GH #7217] Column type handsontable shows only one column when used in first column
Thank you for reporting the issue, Dan.
I’ve added it to our Github issue board https://github.com/handsontable/handsontable/issues/7217 and will notify you once it is solved.