Thank you for writing.
I was able to reproduce the issue. I have logged this in our Public Issue Tracking System - PITS. You can track its progress, subscribe for status changes and add your vote/comment to it on the following link - PITS Issue
For the time being you can use the following workaround:
sender, KeyPressEventArgs e)
RadMaskedEditBox textBox = ((RadMaskedEditBox)sender);
selectionStart = textBox.SelectionStart;
beforePoint = selectionStart - 2 >= 0 && textBox.Text[selectionStart - 2] ==
(e.KeyChar == 8 && beforePoint)
NumericMaskTextBoxProvider numericProvider = (NumericMaskTextBoxProvider)textBox.MaskedEditBoxElement.Provider;
I have also updated your Telerik points for bringing this issue to our attention.
Should you have any other questions or suggestions, do not hesitate to contact us.
the Telerik team