diff --git a/addons/project/models/project.py b/addons/project/models/project.py
index c633dbe13e0..154fde09694 100644
--- a/addons/project/models/project.py
+++ b/addons/project/models/project.py
@@ -2180,6 +2180,8 @@ class Task(models.Model):
 
     @api.depends('parent_id.project_id', 'display_project_id')
     def _compute_project_id(self):
+        # Avoid recomputing kanban_state
+        self.env.remove_to_compute(self._fields['kanban_state'], self)
         for task in self:
             if task.parent_id:
                 task.project_id = task.display_project_id or task.parent_id.project_id