Ordering in Microsoft's Gantt Visual

I am building a gantt chart using Microsoft's gantt visual extension and I came accross the following issue.

I use both task and parent fields when building the visual and I needed to establish a cusom order of displaying the gantt bars. I achieved that by creating sorting columns and sorting the data in data view by those. 

However when I publish the report into Power BI online services, the ordering breaks. I wonder if anyone had similar issue previously and if it was possible to solve it.

Thanks in advance