diff --git a/packages/helpers/src/duration.ts b/packages/helpers/src/duration.ts
index 73db1a32f..06b114386 100644
--- a/packages/helpers/src/duration.ts
+++ b/packages/helpers/src/duration.ts
@@ -43,8 +43,10 @@ export function humanizeSeconds(seconds: number | null): string {
 }
 
 export function toMaxAgeSeconds(value: string, unit: string): number | null {
-  const num = parseFloat(value);
-  if (isNaN(num) || num <= 0) return null;
+  const trimmed = value.trim();
+  if (trimmed === "" || !/^\d+(\.\d+)?$/.test(trimmed)) return null;
+  const num = Number(trimmed);
+  if (!Number.isFinite(num) || num <= 0) return null;
   const u = DURATION_UNITS.find(u => u.value === unit);
   if (!u) return null;
   const rounded = Math.round(num * u.seconds);
diff --git a/pkg/cookiebanner/errors.go b/pkg/cookiebanner/errors.go
index 7059c6e2a..5f39c24af 100644
--- a/pkg/cookiebanner/errors.go
+++ b/pkg/cookiebanner/errors.go
@@ -29,9 +29,9 @@ var (
 	ErrCategorySlugAlreadyExists  = errors.New("a category with this slug already exists in this banner")
 	ErrOriginAlreadyInUse         = errors.New("origin is already used by another active cookie banner")
 	ErrConsentNotFound            = errors.New("consent record not found")
-	ErrCookieNotFound            = errors.New("cookie not found")
-	ErrCategoriesBannerMismatch  = errors.New("source and target categories belong to different banners")
-	ErrPostHogConsentKindInvalid = errors.New("PostHog consent can only be enabled on normal categories")
+	ErrCookieNotFound             = errors.New("cookie not found")
+	ErrCategoriesBannerMismatch   = errors.New("source and target categories belong to different banners")
+	ErrPostHogConsentKindInvalid  = errors.New("PostHog consent can only be enabled on normal categories")
 	ErrCookiePatternNotFound      = errors.New("cookie pattern not found")
 	ErrPatternAlreadyExists       = errors.New("a pattern with this name already exists in this banner")
 	ErrSamePatternCategoryMove    = errors.New("source and target cookie categories must be different")
diff --git a/pkg/cookiebanner/service.go b/pkg/cookiebanner/service.go
index 9eb6c8f7d..272368b86 100644
--- a/pkg/cookiebanner/service.go
+++ b/pkg/cookiebanner/service.go
@@ -2286,11 +2286,16 @@ func (s *Service) ReportDetectedCookies(
 					if err != nil {
 						return fmt.Errorf("cannot insert cookie pattern: %w", err)
 					}
-					if !wasInserted {
-						continue
+					if wasInserted {
+						patternID = newPattern.ID
+						inserted++
+					} else {
+						var existingPattern coredata.CookiePattern
+						if err := existingPattern.LoadByBannerIDAndPattern(ctx, tx, scope, banner.ID, dc.Name); err != nil {
+							return fmt.Errorf("cannot load existing cookie pattern: %w", err)
+						}
+						patternID = existingPattern.ID
 					}
-					patternID = newPattern.ID
-					inserted++
 				}
 
 				cookie := &coredata.Cookie{