MaskedInput focus behaves different when it is set in code behind. When the textbox is on focus and new character is entered the text remains the same and the new character is added at the beginning of the textbox. Scheduled for:
The fix for this issue will be available with LIB (version 2019.1.128) scheduled for publishing on Monday, 28th January 2019.
I have a similar issue, only the new characters I enter are appended to the end of the selected text (ie 1234, enter 5 becomes 12345 instead of 5). Has there been any resolution to this issue? George