Copy/Paste Sales Order Line Does Not Update Commission Information F42160

Very often users need to make changes to existing sales orders and when they go into Sales Order Detail Revisions, they highlight a line and copy it using "Ctrl-C". Then users move down to the end and highlight the last line for entry and paste the copied line using "Ctrl-V". All the field are populated just fine and after saving the changes, although the pasted new line is created in F4211, there's no Commission Info being entered in F42160.

One more thing, there sems to be an exception with line 1 of the existing sales order. Every time line 1 is copied and pasted the Commission Info is entered successfully. Other lines, do not enter the Commission Info in F42160.