From 35ba78b6b4f4bdff204f18f507a86f91efe5b992 Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Wed, 24 Jun 2026 19:16:36 +0200
Subject: [PATCH 1/2] fix: Clear feature flag called cache on shutdown

---
 .changeset/quiet-cycles-shutdown.md | 5 +++++
 lib/posthog/client.rb               | 3 +++
 spec/posthog/client_spec.rb         | 8 ++++++++
 3 files changed, 16 insertions(+)
 create mode 100644 .changeset/quiet-cycles-shutdown.md

diff --git a/.changeset/quiet-cycles-shutdown.md b/.changeset/quiet-cycles-shutdown.md
new file mode 100644
index 0000000..1063d4a
--- /dev/null
+++ b/.changeset/quiet-cycles-shutdown.md
@@ -0,0 +1,5 @@
+---
+"posthog-ruby": patch
+---
+
+Clear the feature flag call dedupe cache on shutdown.
diff --git a/lib/posthog/client.rb b/lib/posthog/client.rb
index 5f80feb..014badc 100644
--- a/lib/posthog/client.rb
+++ b/lib/posthog/client.rb
@@ -790,6 +790,9 @@ def shutdown
         @worker&.shutdown
         @worker_thread&.join(1)
       end
+      @distinct_id_has_sent_flag_calls_mutex.synchronize do
+        @distinct_id_has_sent_flag_calls.clear
+      end
     end
 
     private
diff --git a/spec/posthog/client_spec.rb b/spec/posthog/client_spec.rb
index 3a4a609..553f236 100644
--- a/spec/posthog/client_spec.rb
+++ b/spec/posthog/client_spec.rb
@@ -1534,6 +1534,14 @@ def run
     end
 
     describe '#shutdown' do
+      it 'clears feature flag call dedupe cache' do
+        client.instance_variable_get(:@distinct_id_has_sent_flag_calls)['user'] = ['flag_true']
+
+        client.shutdown
+
+        expect(client.instance_variable_get(:@distinct_id_has_sent_flag_calls).length).to eq(0)
+      end
+
       it 'is idempotent and stops accepting new events' do
         worker = instance_spy(PostHog::NoopWorker, is_requesting?: false)
         client.instance_variable_set(:@worker, worker)

From 9b37ad0c81d874b4daf1d2a470459be5075d89de Mon Sep 17 00:00:00 2001
From: Manoel Aranda Neto <marandaneto@gmail.com>
Date: Wed, 24 Jun 2026 19:41:47 +0200
Subject: [PATCH 2/2] chore: release posthog-rails for shutdown fix

---
 .changeset/quiet-cycles-shutdown.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.changeset/quiet-cycles-shutdown.md b/.changeset/quiet-cycles-shutdown.md
index 1063d4a..11c3120 100644
--- a/.changeset/quiet-cycles-shutdown.md
+++ b/.changeset/quiet-cycles-shutdown.md
@@ -1,5 +1,6 @@
 ---
 "posthog-ruby": patch
+"posthog-rails": patch
 ---
 
 Clear the feature flag call dedupe cache on shutdown.