Using custom JS to set a date is not working as expected

[RichardWoj]

Describe the problem
I need to set an "issuance date" to today's date as soon as the user has filled an amount field for an invoice.
I do so with a javascript:
const issuanceDateInput = container.querySelector('.issuance-date-input input[type="text"]');
amountInput.addEventListener('change', () => {
if (amountInput.value !== "") {
issuanceDateInput.value = formatDate(new Date());
issuanceDateHiddenInput.value = formatDate(new Date());

The calculated value is displayed on the browser but the value is not in the post message sent to the server
Do I have to trigger some event?

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
I am expecting the value displayed by the browser to be part of the post message sent to the server

Console errors

• No error on django console.
• No error on JavaScript console.

Paste-bin
The page is showing up but the date-picker calendar is not. The paste-bin link
of the HTML source of the page is http://...

Setup Information (please complete the following information):

• OS: [e.g. Windows 10] Windows
• Browser [e.g. chrome, safari] Edge
• Browser version [e.g. 22]
• Python version [e.g. 3.7] 3.11.3
• Django version [e.g. 2.1]
• Bootstrap version [e.g. 3/4] 5
• jQuery version [e.g. 1.7.1]

[x] I have followed the configuration instructions and checked out the
common error troubleshooting page.

[silvioba]

I observed this too. It's very annoying.
How did you fixed @RichardWoj ?