MM-64687: Racy tests in TestSharedChannelPostMetadataSync (#32144)

server/channels/api4/shared_channel_metadata_test.go

@@ -119,6 +119,7 @@ func TestSharedChannelPostMetadataSync(t *testing.T) {
 	defer th.TearDown()
 
 	t.Run("Post Priority Metadata Self-Referential Sync", func(t *testing.T) {
+		t.Skip("MM-64687")
 		var syncedPosts []*model.Post
 
 		// Create test HTTP server using self-referential approach
@@ -244,6 +245,7 @@ func TestSharedChannelPostMetadataSync(t *testing.T) {
 	})
 
 	t.Run("Acknowledgement Count Sync Back to Sender", func(t *testing.T) {
+		t.Skip("MM-64687")
 		EnsureCleanState(t, th, th.App.Srv().Store())
 		var syncedPosts []*model.Post
 		var postIdToSync string
@@ -347,6 +349,7 @@ func TestSharedChannelPostMetadataSync(t *testing.T) {
 	})
 
 	t.Run("Persistent Notifications Self-Referential Sync", func(t *testing.T) {
+		t.Skip("MM-64687")
 		EnsureCleanState(t, th, th.App.Srv().Store())
 		var syncedPosts []*model.Post
 
@@ -399,6 +402,7 @@ func TestSharedChannelPostMetadataSync(t *testing.T) {
 	})
 
 	t.Run("Cross-Cluster Acknowledgement End-to-End Flow", func(t *testing.T) {
+		t.Skip("MM-64687")
 		EnsureCleanState(t, th, th.App.Srv().Store())
 		var syncedPostsServerA []*model.Post
 		var syncedPostsServerB []*model.Post

server/channels/app/shared_channel_membership_sync_self_referential_test.go

@@ -526,6 +526,7 @@ func TestSharedChannelMembershipSyncSelfReferential(t *testing.T) {
 		assert.NotContains(t, syncedInSecondCall, user2.Id, "Second sync should not re-sync existing users")
 	})
 	t.Run("Test 4: Sync failure and recovery", func(t *testing.T) {
+		t.Skip("MM-64687")
 		// This test verifies that membership sync handles remote server failures gracefully
 		// and successfully syncs members once the remote server recovers.
 		// We test that: