When setting a group content relationship form widget to inline entity form instead of autocomplete the value for 'entity_repeat_enabled' is nested further down rather there where getvalue finds it with autocomplete.
array:8 [▼
"entity_id" => array:1 [▼
0 => array:1 [▼
"inline_entity_form" => array:7 [▼
"description" => array:1 [▶]
"field_datestimes" => array:1 [▼
0 => array:11 [▼
"start" => Drupal\Core\Datetime\DrupalDateTime {#4932 ▶}
"end" => Drupal\Core\Datetime\DrupalDateTime {#4942 ▶}
"mode" => "weekly"
"daily_count" => 1
"weekdays" => array:7 [▶]
"ordinals" => array:7 [▶]
"time_zone" => "Australia/Sydney"
"ends_mode" => "date"
"ends_count" => "11"
"ends_date" => Drupal\Core\Datetime\DrupalDateTime {#4936 ▶}
"entity_repeat_enabled" => 1Postponed: needs info
1.1
Code