diff --git a/doc/82-Changelog.md b/doc/82-Changelog.md
index bdecd8641..f2713683f 100644
--- a/doc/82-Changelog.md
+++ b/doc/82-Changelog.md
@@ -35,6 +35,7 @@ This version hasn't been released yet
 * FEATURE: regular expression based modifier allows explicit NULL on no match (#2705)
 * FEATURE: property modifiers can now be applied based on filters (#2756)
 * FEATURE: CIDR notation (network ranges) is supported in such filters (#2757)
+* FEATURE: trigger group membership resolution on group sync conditionally (#2812)
 * FIX: synchronizing Service (and -Set) Templates has been fixed (#2745, #2217)
 * FIX: null properties with Sync policy "ignore" are now being ignored (#2657)
 * FIX: Import Source shows available columns for Core API Import (#2763)
diff --git a/library/Director/Import/Sync.php b/library/Director/Import/Sync.php
index 523dfbc83..37a690ef4 100644
--- a/library/Director/Import/Sync.php
+++ b/library/Director/Import/Sync.php
@@ -16,6 +16,7 @@
 use Icinga\Module\Director\Objects\IcingaHost;
 use Icinga\Module\Director\Objects\IcingaHostGroup;
 use Icinga\Module\Director\Objects\IcingaObject;
+use Icinga\Module\Director\Objects\IcingaObjectGroup;
 use Icinga\Module\Director\Objects\ImportSource;
 use Icinga\Module\Director\Objects\IcingaService;
 use Icinga\Module\Director\Objects\SyncProperty;
@@ -91,6 +92,12 @@ class Sync
     /** @var ?DbObjectStore */
     protected $store;
 
+    /** @var IcingaObjectGroup[] */
+    protected $modifiedGroups = [];
+
+    /** @var IcingaObject[] */
+    protected $modifiedGroupObjects = [];
+
     /**
      * @param SyncRule $rule
      * @param ?DbObjectStore $store
@@ -637,6 +644,9 @@ protected function setResolver($object)
     protected function notifyResolvers()
     {
         if ($resolver = $this->getHostGroupMembershipResolver()) {
+            if ($this->rule->get('object_type') === 'hostgroup') {
+                $resolver->setGroups($this->modifiedGroups);
+            }
             $resolver->refreshDb(true);
         }
 
@@ -760,6 +770,13 @@ protected function processObject($key, $object)
         }
     }
 
+    protected function optionallyTellResolverAboutModifiedGroup(IcingaObjectGroup $group)
+    {
+        if (in_array('assign_filter', $group->getModifiedProperties())) {
+            $this->modifiedGroups[] = $group;
+        }
+    }
+
     /**
      * @param $key
      * @param DbObject|IcingaObject $object
@@ -866,6 +883,9 @@ public function apply()
                 }
 
                 if ($object->hasBeenModified()) {
+                    if ($object instanceof IcingaObjectGroup) {
+                        $this->optionallyTellResolverAboutModifiedGroup($object);
+                    }
                     $existing = $object->hasBeenLoadedFromDb();
                     if ($existing) {
                         if ($this->store) {