In a multilingual site, For a node translated, the field state_machine formatter displays the allowed transitions always from the value of the field state in the node from default language.
In the StateTransitionForm which load the entity, load the correct translation of this entity.
$this->entity = $this->entityTypeManager->getStorage($entity_type)->load($entity_id);
will become
$entity = $this->entityTypeManager->getStorage($entity_type)->load($entity_id);
$this->entity = $this->entityRepository->getTranslationFromContext($entity);
Fixed
1.0
Code
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Issue #2876181 by flocondetoile: Field formatter for field state machine...
Automatically closed - issue fixed for 2 weeks with no activity.