Blank screen when opening tickets containing Forms

Issue Summary

When clicking on a ticket via Queues or via Issue Navigator and the ticket contains a Form, most of the time the page doesn't load, and a blank screen is shown instead.

Steps to Reproduce

1. Go to Queue or Issue Navigator.
2. Click on a ticket that has a Form.
3. In case it loads, go back and click on another one.

Expected Results

The ticket loads normally.

Actual Results

It shows a blank screen.

On the network tab, it's possible to see that "?heartbeat=300&tt=16871959934825487&tr=25&uuid=557058" keeps on the pending status.

It will show 200 eventually, but a new "?heartbeat=300&tt=16871959934825487&tr=25&uuid=557058" will appear showing that the request is still queued.

Workaround

Refresh the page and the ticket should load normally.