Dual list is not moving over the correct selection

Document ID : KB000111041
Last Modified Date : 14/08/2018
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Issue:
In 17.x if I have a dual list it is sometimes not moving over the correct selection to the box on the right.
Cause:
This only occurs when you have duplicate "values" for the selections on the left.
This should be allowed and is now fixed.
Resolution:
This is fixed in the patch T6D9385.caz and will also be fixed in RU2.