Block Editor not obeying the "default_term" property of a custom taxonomy

[WRasada]

Helpscout Ticket:
https://secure.helpscout.net/conversation/1747240753/1724809?folderId=6105735

Expected Behavior

When using Block Editor, the "Default Event Calendar" should work

Current Behavior

The default calendar does not automatically assign when adding a new event inside the Block Editor

Steps to Reproduce

1. Install Sugar Calendar
2. Enable "Block Editor" as the default in Settings > Editing and assign a default calendar
3. Add a new event and check if the calendar is assigned in the Block Editor