closes #3767

public/src/client/category.js

@@ -14,7 +14,7 @@ define('forum/category', [
 
 	$(window).on('action:ajaxify.start', function(ev, data) {
 		if (ajaxify.currentPage !== data.url) {
-			navigator.hide();
+			navigator.disable();
 
 			removeListeners();
 		}
@@ -39,12 +39,12 @@ define('forum/category', [
 
 		sort.handleSort('categoryTopicSort', 'user.setCategorySort', 'category/' + ajaxify.data.slug);
 
-		enableInfiniteLoadingOrPagination();
-
 		if (!config.usePagination) {
 			navigator.init('[component="category/topic"]', ajaxify.data.topic_count, Category.toTop, Category.toBottom, Category.navigatorCallback);
 		}
 
+		enableInfiniteLoadingOrPagination();
+
 		$('[component="category"]').on('click', '[component="topic/header"]', function() {
 			var clickedIndex = $(this).parents('[data-index]').attr('data-index');
 			$('[component="category/topic"]').each(function(index, el) {
@@ -173,7 +173,7 @@ define('forum/category', [
 		if (!config.usePagination) {
 			infinitescroll.init($('[component="category"]'), Category.loadMoreTopics);
 		} else {
-			navigator.hide();
+			navigator.disable();
 		}
 	}
 

public/src/client/topic.js

@@ -19,7 +19,7 @@ define('forum/topic', [
 
 	$(window).on('action:ajaxify.start', function(ev, data) {
 		if (ajaxify.currentPage !== data.url) {
-			navigator.hide();
+			navigator.disable();
 			components.get('navbar/title').find('span').text('').hide();
 			app.removeAlert('bookmark');
 
@@ -216,7 +216,7 @@ define('forum/topic', [
 		if (!config.usePagination) {
 			infinitescroll.init($('[component="topic"]'), posts.loadMorePosts);
 		} else {
-			navigator.hide();
+			navigator.disable();
 		}
 	}
 

public/src/modules/navigator.js

@@ -18,7 +18,7 @@ define('navigator', ['forum/pagination', 'components'], function(pagination, com
 		toTop = toTop || function() {};
 		toBottom = toBottom || function() {};
 
-		$(window).on('scroll', navigator.update);
+		$(window).off('scroll', navigator.update).on('scroll', navigator.update);
 
 		$('.pagination-block .dropdown-menu').off('click').on('click', function(e) {
 			e.stopPropagation();
@@ -74,7 +74,12 @@ define('navigator', ['forum/pagination', 'components'], function(pagination, com
 		toggle(true);
 	};
 
-	navigator.hide = function() {
+	navigator.disable = function() {
+		count = 0;
+		index = 1;
+		navigator.selector = navigator.callback = null;
+		$(window).off('scroll', navigator.update);
+
 		toggle(false);
 	};