Will you try this test in another browser (after waiting the initial 12 hours) and see if that works? You can also attempt it in an incognito browser as well. If these things still don't work, please open a Support ticket so our team can collect a HAR file from you.
Take care,
Nicole
Community Helper & Sr Support Specialist
Our community moderators may not be timely in every response. Here's how to reach out to HubSpot Support with any questions related to challenges within your HubSpot account, including the Academy.