InputNumber Currency not working as expected

[Fanmade]

Expected behavior: See https://www.primefaces.org/showcase/ui/input/inputNumber.xhtml

Current behavior: I can only input number before the decimal separator. If I try to type the separator (no matter if "." or my local ","), it does ignore my input. I have to manually select each digit behind the decimal separator to be able to change it. After any input behind the decimal separator, the cursor jumps to the end of the line.

If I select the current value and start typing, the cursor just accepts the first digit and then immediately jumps to the end of the line.