Numeric PaddedString gets parsed as hex number

[robin523790]

We have a 10-byte PaddedString like this:

    value: str = cst.csfield(
        cs.PaddedString(10, "ascii"),
    )

This works fine when I enter text, but in the case of a numeric input (any hex number, ie. [0..9A..Fa..f]) the field throws a parsing error:

For the input "1234" I would expect the string to be parsed as bytes "\x31\x32\x33\x34\x00\x00\x00\x00\x00\x00".