diff --git a/services/protocols/internal/e2e/imap_idle_condstore_e2e_test.go b/services/protocols/internal/e2e/imap_idle_condstore_e2e_test.go
index 2a32f55..ef1ab08 100644
--- a/services/protocols/internal/e2e/imap_idle_condstore_e2e_test.go
+++ b/services/protocols/internal/e2e/imap_idle_condstore_e2e_test.go
@@ -175,8 +175,8 @@ func TestImapIdleAndCondStoreEndToEnd(t *testing.T) {
 	if err != nil {
 		t.Fatalf("SEARCH FLAGGED: %v", err)
 	}
-	if searchRes.Count != 1 {
-		t.Fatalf("SEARCH FLAGGED expected 1 result, got %d", searchRes.Count)
+	if len(searchRes.AllSeqNums()) != 1 {
+		t.Fatalf("SEARCH FLAGGED expected 1 result, got %d (all=%v)", len(searchRes.AllSeqNums()), searchRes.AllSeqNums())
 	}
 
 	// --- IDLE test -----------------------------------------------------------
diff --git a/services/protocols/internal/presentation/imap/backend.go b/services/protocols/internal/presentation/imap/backend.go
index 269c7cb..c870326 100644
--- a/services/protocols/internal/presentation/imap/backend.go
+++ b/services/protocols/internal/presentation/imap/backend.go
@@ -5,6 +5,7 @@ import (
 	"bytes"
 	"context"
 	"errors"
+	"log"
 
 	"github.com/emersion/go-imap/v2"
 	"github.com/emersion/go-imap/v2/imapserver"
@@ -179,6 +180,8 @@ func (s *session) numSetIter(numSet imap.NumSet, messages []port.MessageRecord,
 			if set != nil {
 				contains = set.Contains(imap.UID(msg.UID))
 			}
+		default:
+			log.Printf("[DEBUG numSetIter] UNKNOWN numSet type: %T (val=%#v)", numSet, numSet)
 		}
 		if contains {
 			f(seqNum, msg)