Use track by $index to avoid ticks to be re-added at each frame.

dist/rzslider.js

@@ -1451,7 +1451,7 @@
   'use strict';
 
   $templateCache.put('rzSliderTpl.html',
-    "<span class=rz-bar-wrapper><span class=rz-bar></span></span> <span class=rz-bar-wrapper><span class=\"rz-bar rz-selection\" ng-style=barStyle></span></span> <span class=rz-pointer></span> <span class=rz-pointer></span> <span class=\"rz-bubble rz-limit\"></span> <span class=\"rz-bubble rz-limit\"></span> <span class=rz-bubble></span> <span class=rz-bubble></span> <span class=rz-bubble></span><ul ng-show=showTicks class=rz-ticks><li ng-repeat=\"t in ticks\" class=tick ng-class=\"{selected: t.selected}\" ng-style=t.style><span ng-if=\"t.value != null && t.tooltip == null\" class=tick-value>{{ t.value }}</span> <span ng-if=\"t.value != null && t.tooltip != null\" class=tick-value uib-tooltip=\"{{ t.tooltip }}\" tooltip-placement={{t.tooltipPlacement}}>{{ t.value }}</span></li></ul>"
+    "<span class=rz-bar-wrapper><span class=rz-bar></span></span> <span class=rz-bar-wrapper><span class=\"rz-bar rz-selection\" ng-style=barStyle></span></span> <span class=rz-pointer></span> <span class=rz-pointer></span> <span class=\"rz-bubble rz-limit\"></span> <span class=\"rz-bubble rz-limit\"></span> <span class=rz-bubble></span> <span class=rz-bubble></span> <span class=rz-bubble></span><ul ng-show=showTicks class=rz-ticks><li ng-repeat=\"t in ticks track by $index\" class=tick ng-class=\"{selected: t.selected}\" ng-style=t.style><span ng-if=\"t.value != null && t.tooltip == null\" class=tick-value>{{ t.value }}</span> <span ng-if=\"t.value != null && t.tooltip != null\" class=tick-value uib-tooltip=\"{{ t.tooltip }}\" tooltip-placement={{t.tooltipPlacement}}>{{ t.value }}</span></li></ul>"
   );
 
 }]);

src/rzSliderTpl.html

@@ -10,7 +10,7 @@
 <span class="rz-bubble"></span> <!-- // 7 Label above right slider handle -->
 <span class="rz-bubble"></span> <!-- // 8 Range label when the slider handles are close ex. 15 - 17 -->
 <ul ng-show="showTicks" class="rz-ticks"> <!-- // 9 The ticks -->
-  <li ng-repeat="t in ticks" class="tick" ng-class="{selected: t.selected}"
+  <li ng-repeat="t in ticks track by $index" class="tick" ng-class="{selected: t.selected}"
       ng-style="t.style">
     <span ng-if="t.value != null && t.tooltip == null" class="tick-value">{{ t.value }}</span>
     <span ng-if="t.value != null && t.tooltip != null" class="tick-value"