FacetManipulationTrait::getFacetFieldDefinition returning wrong field name and by extension wrong field definition.

[Kirkdeam]

Trying to get list pages to work with a user profile index, and found this problem.
We have a field, in our index, that belongs to the user entity, and not the profile entity. The field has this property path revision_user:entity:field_current_location

$parts = explode(':', $property_path);
if (count($parts) > 1) {
  $field_name = $parts[0]; // Should be end($parts) (?)
}

The above code returns the "revision_user" as field name which is wrong, as the field_current_location is the right one.
I am not creating a PR with a fix, because I am not sure if a case, which current code will work, exists.