diff --git a/src/js/logger-ui.js b/src/js/logger-ui.js
index eeb6cb904..398b664fb 100644
--- a/src/js/logger-ui.js
+++ b/src/js/logger-ui.js
@@ -972,6 +972,7 @@ var netFilteringManager = (function() {
                     'loggerUI',
                     {
                         what: 'createUserFilter',
+                        pageDomain: targetPageDomain,
                         filters: '! ' + d.toLocaleString() + ' ' + targetPageDomain + '\n' + value
                     }
                 );
diff --git a/src/js/messaging.js b/src/js/messaging.js
index 360c17b7a..2b9096f1f 100644
--- a/src/js/messaging.js
+++ b/src/js/messaging.js
@@ -112,6 +112,8 @@ var onMessage = function(request, sender, callback) {
 
     case 'createUserFilter':
         µb.appendUserFilters(request.filters);
+        // https://github.com/gorhill/uBlock/issues/1786
+        µb.cosmeticFilteringEngine.removeFromSelectorCache(request.pageDomain);
         break;
 
     case 'forceUpdateAssets':