Behavior script is not loaded on Service Desk if the request page loads slowly

The behavior script mapped to the Service Desk request type will not be applied if the Service Desk request page takes more than 3 seconds to load the HTTP call

/rest/servicedesk/<PORTAL_ID>/customer/models

This log line is displayed inside the browser console:

[SR Behaviours] Behaviours not applicable to the current form / screen

Steps to reproduce (does not occur all the time):

• Install the third-party plugin "Extension for Jira Service Desk" and configure some bundled fields
• Add more than 150 fields to a request type screen (including the "Extension for Jira Service Desk" fields)
• Add a simple behavior script on the service desk request type
• Open the request page from the service desk portal

Expected result:
The request page is loaded and the behavior script is applied to the page

Actual result:
The request page is loaded but the behavior script is not applied to the page

The problem is more likely to occur if you simulate a slow network.