Cannot edit a character in LinePinField

[waseem786]

I am really happy to say this, this is the best pin input library available on the internet.
Lots of features, customisable and smooth.

I found an issue when I use the library,
After entering an input, if I need to edit a specific character directly, LinePinField does not allow it (even if the cursor is enabled).

Example:
If I have inputted '123456', and if I want to change '2' to 'B', I couldn't place the cursor on '2' and edit, I have to clear all the text up to '2' and input new texts.

Is there any fix or alternative solution for this?