[Intermittent] Sometimes importing avatars and scenes gets stuck

[Softvision-GeluHaiduc]

[Affected Versions]:

• Firefox Release 84.0.2

[Affected Platforms]:

• Windows 10x64

[Prerequisites]:

• Make sure to use never before imported packs.

[Steps to reproduce]:

1. Click the "Import Content" list item from the left side menu in the "Content" section.
2. Input a valid URL to a pack of avatars/scenes and click the "Preview Import" button.
3. Click the "Import # Items" button and observe the behavior.

[Expected results]:

• The avatars/scenes selected are imported one after the other.

[Actual results]:

• Sometimes the avatars/scenes selected are not imported and the loading icon is stuck on an item.

[Notes]:

• The issue is not always reproducible.
• Attached a screen recording of the issue bellow

┆Issue is synchronized with this Jira Task