Released products with variants exist with a default order setting for sales lead time with Rank 0 for the Master dimension.
Further lead times exist in ranks for combinations of dimensions and some with no lead time.

A sales order is created for the item and the �requested ship date� is automatically completed according to settings. Dimensions are added and the �requested ship date� changes due to the different settings. If a dimension is entered with a rank that has a shorter date than the default rank, the date does not switch back if another dimension is selected.

This is a clear bug and requires correction sooner than later.