A multi-column row disappears when another element is added to it, if the row was added to the canvas via drag and drop. #341
Description
Version: 0.20.3
If a multi-column row is added to the canvas by drag and drop, and then if you drag another element already on canvas, e.g. an Text input, to that multi-column row, the row will disappear.
It only happens when the multi-column row is added by drag and drop. If it's added by clicking on the Toolbox, no issue. Additionally, if another element is dragged from the Toolbox instead of from the canvas to that multi-column row, most times there is no issue.
Please refer to the enclosed screencast.