Batch.js and Batch.css not loading when JSD ticket is opened for the first time.

[Mario Puco]

Hello,

Following issue happens when a user (Customer in JSD) try to submit a ticket via JSD:
First time the user opens ANY request, the page loader shows and it's spinning to infinity.
In this moment in browser console batch.js and batch.css show the 400 status.
If I manually refresh the browser the request shows and batch.js and batch.css display status 200.
So far nothing helped:

- testing this in multiple browsers,
- disabling all browser extensions
- disabling firewalls
- reducing network adapter's MTU size

This is HTTP status 400:

- https://xx.xxxx.xx/s/4da7ce94470ede515a500af0d07c6db2-T/95gib6/805002/c79942cdc5fc76f66cb868e5c1efcceb/c81f530e77c19a41adf7cf9e966f5bcc/_/download/contextbatch/js/com.atlassian.servicedesk.frontend-webpack-plugin:17,-jira.webresources:mentions-feature,-customerportal,-com.atlassian.analytics.analytics-client:js-events,-com.atlassian.servicedesk.frontend-webpack-plugin:19,-browser-metrics-plugin.contrib,-jira.webresources:almond/batch.js?locale=hu-HU

Bad Request - Invalid URL
HTTP Error 400. The request URL is invalid.

After refresh the broweser manualy the requested URL looks like this:

- https://xx.xxxx.xx/s/c0bfe08a06c747edbdb59f1192f5701d-T/95gib6/805002/c79942cdc5fc76f66cb868e5c1efcceb/2197621b0189c24fa5a5ddd3e8de5a80/_/download/contextbatch/js/com.atlassian.servicedesk.frontend-webpack-plugin:17,jira.webresources:mentions-feature,-customerportal,-com.atlassian.analytics.analytics-client:js-events,-browser-metrics-plugin.contrib,-jira.webresources:almond/batch.js?locale=hu-HU

Thanks in advance.