Scenario A:
  1. Open worlds list
  2. Navigate to desired world
  3. Group+ instance is not listed (but this would list invite-only and friends-only instances if there were any, this behavior is therefore inconsistent with scenario B)
Scenario B:
  1. Open groups list
  2. Navigate to group
  3. Navigate to instances list of group
  4. Click on instance
  5. Group+ instance is listed and pre-selected
The in-app UI queries the list of instances through the
worlds/<id>
API endpoint which appears to not return Group+ instances regardless of the viewer being a member of the group or having a friend in the instance.

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