Cursor position when deleting last number before seperator

Hey guys,

We are using rifm for input fields where the value of the input should be a number with a two digit fractional part

We're having some issues when deleting the last number before the decimal seperator.

The issue:
Let's assume the value of the field to be |5.23 and the cursor position is marked as '|'
If the user press delete the input field will display |0.23
If the user now press a number i.e. 6 the field will display 6|0.23

This is an issue because the user will assume that the field display 6|.23 and not 6|0.23

You can reproduce the behaivor in rifm's demo sandbox. I also made an isolated sandbox here:
https://codesandbox.io/s/async-hill-r1hpx?file=/index.js

Are we missing some configuration to avoid this behaivor or is it an edge case?

Cheers from Norway,
Simon