Yang UI - API tab - Incorrect regexp in node > igp-node-attributes > prefix input fields

Repro steps:
1. Yang UI > API tab > network-topology rev > config > network-topology > topology

> node

> igp-node-attributes > click prefix to load prefix-list button in the form.
2. Input IPv6 prefixes in prefix input field, right string tab selected.
BUGGY BEHAVIOUR:
There should be some exclamation mark as warning of incorrect form of the input when you enter such data. In some cases, however, this exclamation mark does not appear.
E.g. input 2001:db8::1/(whatever number after slash)13543483641351368. There is no control of the format pf the number entered after slash.
E.g. when entering letters in IPv6 format as if there was no control when you enter more bytes as there should be in IPV6, e.g. a:db8:a:a:a:a:a:a:a:a:a:a:a/135.
E.g. when entering letters in IPv6 format and inserting 7 and more bytes, the IP address can end with : colon.