diff --git a/app/models/reviewable_flagged_post.rb b/app/models/reviewable_flagged_post.rb
index 4ea646aea72..cf5829b611b 100644
--- a/app/models/reviewable_flagged_post.rb
+++ b/app/models/reviewable_flagged_post.rb
@@ -211,7 +211,8 @@ class ReviewableFlaggedPost < Reviewable
   def perform_delete_and_ignore_replies(performed_by, args)
     result = perform_ignore(performed_by, args)
 
-    replies = PostReply.where(post_id: post.id).includes(:reply).map(&:reply)
+    reply_ids = post.reply_ids(Guardian.new(performed_by), only_replies_to_single_post: false)
+    replies = Post.where(id: reply_ids.map { |r| r[:id] })
     PostDestroyer.new(performed_by, post).destroy
     replies.each { |reply| PostDestroyer.new(performed_by, reply).destroy }
 
@@ -227,7 +228,8 @@ class ReviewableFlaggedPost < Reviewable
   def perform_delete_and_agree_replies(performed_by, args)
     result = agree(performed_by, args)
 
-    replies = PostReply.where(post_id: post.id).includes(:reply).map(&:reply)
+    reply_ids = post.reply_ids(Guardian.new(performed_by), only_replies_to_single_post: false)
+    replies = Post.where(id: reply_ids.map { |r| r[:id] })
     PostDestroyer.new(performed_by, post).destroy
     replies.each { |reply| PostDestroyer.new(performed_by, reply).destroy }
 
diff --git a/spec/models/reviewable_flagged_post_spec.rb b/spec/models/reviewable_flagged_post_spec.rb
index 9a6b185069a..4ca31603315 100644
--- a/spec/models/reviewable_flagged_post_spec.rb
+++ b/spec/models/reviewable_flagged_post_spec.rb
@@ -131,6 +131,12 @@ RSpec.describe ReviewableFlaggedPost, type: :model do
         reply_to_post_number: post.post_number,
         topic_id: post.topic_id
       )
+      nested_reply = PostCreator.create(
+        Fabricate(:user),
+        raw: 'this is the reply text2',
+        reply_to_post_number: reply.post_number,
+        topic_id: post.topic_id
+      )
       post.reload
 
       reviewable.perform(moderator, :delete_and_ignore_replies)
@@ -138,6 +144,7 @@ RSpec.describe ReviewableFlaggedPost, type: :model do
       expect(score.reload).to be_ignored
       expect(post.reload.deleted_at).to be_present
       expect(reply.reload.deleted_at).to be_present
+      expect(nested_reply.reload.deleted_at).to be_present
     end
 
     it "delete_and_agree agrees with the flags and deletes post" do
@@ -154,6 +161,12 @@ RSpec.describe ReviewableFlaggedPost, type: :model do
         reply_to_post_number: post.post_number,
         topic_id: post.topic_id
       )
+      nested_reply = PostCreator.create(
+        Fabricate(:user),
+        raw: 'this is the reply text2',
+        reply_to_post_number: reply.post_number,
+        topic_id: post.topic_id
+      )
       post.reload
 
       reviewable.perform(moderator, :delete_and_agree_replies)
@@ -161,6 +174,7 @@ RSpec.describe ReviewableFlaggedPost, type: :model do
       expect(score.reload).to be_agreed
       expect(post.reload.deleted_at).to be_present
       expect(reply.reload.deleted_at).to be_present
+      expect(nested_reply.reload.deleted_at).to be_present
     end
 
     it "disagrees with the flags" do