Editable JComboBox looks like non-editable JCombobox after disabling & enabling in Motif Look And Feel.

I have a Jframe with JComboBox, & two button."Enable" button to enables the JComboBox & "Disable" button disables the JComboBox.

step to reproduce
1) Start the program with MotifLookAndFeel.
2) Observe the Editable JComboBox.
3) Click the "Disable" button. You see the JComboBox is disabled.
4) Click the "Enable" button . You see the JComboBox is not painted to Editable
            JComboBox , look like non-editable JCombobox.

I tested this code with tiger rc b63 built it is reproduce there also.