Gantt chart doesn't like percentages?

Hi everyone,

I'm having some issues getting a Gantt chart to work with percentages. My dataset is basically a list of orders. Each order has a quantity ordered, a quantity completed for that order, and then I also have a calculated column that displays the percent complete for that order (settings shown below:)

So as you can see, this is supposed to show a calculated percentage with 0 decimal places. In the AllView view, this looks just as I would expect it:

Now I have another view which is a Gantt chart. I have it configured so that the Percent complete pulls its data from my Completion calculated column above. When I switch to the Gantt chart view, it errors out with "This list cannot be displayed as a Gantt chart because it lacks required fields." If I make the Percent completed field optional in the Gantt chart configuration, it is able to load without a hard error. However, the Gantt chart ignores my configuration of the column insofar as decimal places and percentage values are concerned:

So I don't seem to have any options for displaying a nice completion value anywhere in the Gantt chart. I understand from https://social.technet.microsoft.com/Forums/sharepoint/en-US/6498a9f2-fe65-4bcf-a67d-40200adf6afc/using-calculated-fields-to-show-percentage-complete-in-a-gant?forum=sharepointadminlegacy that this is a bug in the Gantt chart, that it's unable to display calculated values. Is there any chance of any of these bugs (displaying calculated values or respecting column configurations) being fixed?

Thank you!