Update utils.py

utils.py

@@ -309,7 +309,9 @@ start_cleaner = """async() => {
         } catch(e) {
         }        
     }
-    window['checkCanvas_interval'] = window.setInterval("window.checkCanvas()", 100);
+    if (isMobile()) {
+        window['checkCanvas_interval'] = window.setInterval("window.checkCanvas()", 100);
+    }
 }"""
 
 download_img = """async() => {