Select text in the RadMaskedTextInput then Ctrl + X cuts the text but Ctrl + V does not paste it. Steps to reproduce: 1) Type 12345. Select 345. 2) Ctr + X. 3) Ctrl + V won't do anything. (345 is not pasted) the result is - "_______________"). Expected result is: "345". This should replace the whole text with the copied one. SelectionStart is not changed after paste. Notes: This bug is only for the scenario Cut + Paste in the MaskedTextInput with Mask. Pasting in No-Masked MaskedTextInput (Mask="") should work much like pasting in normal TextBox (in the same scenario the result should be "12345").