Unable to choose MPN material to material field in ME11

Hi,

I am unable to choose MPN material from selection option into material field in ME11. Even if I click and choose the MPN Material, the "Int. material. no." is copied to the material field in selection screen. Can I know whether this behaviour is a standard functionality? Is it possible to get MPN material in material field in ME11 with MPN search help.

I am attaching a screenshot for reference.

Regards,

Vineeth