From d104d479118c2f9f85993a3add1690a08fa8c670 Mon Sep 17 00:00:00 2001
From: Ben Thomson <git@alfreido.com>
Date: Mon, 24 Aug 2020 15:18:33 +0800
Subject: [PATCH] Clear relation fields when unlinking a relation

---
 modules/backend/behaviors/RelationController.php | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/modules/backend/behaviors/RelationController.php b/modules/backend/behaviors/RelationController.php
index 8def35f28..acbf912b1 100644
--- a/modules/backend/behaviors/RelationController.php
+++ b/modules/backend/behaviors/RelationController.php
@@ -1331,7 +1331,11 @@ class RelationController extends ControllerBehavior
                 }
             }
 
+            // Reinitialise the form with a blank model
+            $this->initRelation($this->model);
+
             $this->viewWidget->setFormValues([]);
+            $this->viewModel = $this->relationModel;
         }
 
         return $this->relationRefresh();