diff --git a/webui/src/web-components/sketch-diff-range-picker.ts b/webui/src/web-components/sketch-diff-range-picker.ts
index 0e20636..e6a293e 100644
--- a/webui/src/web-components/sketch-diff-range-picker.ts
+++ b/webui/src/web-components/sketch-diff-range-picker.ts
@@ -335,7 +335,7 @@
   handleBlur(_event: FocusEvent) {
     // Small delay to allow click events to process
     setTimeout(() => {
-      if (!this.shadowRoot?.activeElement?.closest(".custom-select")) {
+      if (!this.closest(".custom-select")) {
         this.dropdownOpen = false;
       }
     }, 150);