Project Forecast Loader issues - 24C - Not loading Period amounts

In 24C testing, we have come across an issue that seems to occur when loading project forecast via the FBDI.

The below example shows a sample forecast test, in which were are loading Periodic amounts into a forecast.

The issue:

When you load in processing mode "Create", the forecast is created as expected, except that NO Periodic amounts for the forecast are loaded. Only when the FBDI is run again, and processing mode is changed to UPDATE and the 'Plan Version Number' is manually retreived and updated in the FBDI, does the forecast get fully updated with what was originally intended.