diff --git a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/groups/ProcessGroup.java b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/groups/ProcessGroup.java
index e989c84086..d06d49cbb2 100644
--- a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/groups/ProcessGroup.java
+++ b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-framework-core-api/src/main/java/org/apache/nifi/groups/ProcessGroup.java
@@ -50,7 +50,7 @@ public interface ProcessGroup extends Authorizable, Positionable {
     /**
      * Predicate for filtering schedulable Processors.
      */
-    Predicate<ProcessorNode> SCHEDULABLE_PROCESSORS = node -> !node.isRunning() && node.getScheduledState() != ScheduledState.DISABLED;
+    Predicate<ProcessorNode> SCHEDULABLE_PROCESSORS = node -> !node.isRunning() && !ScheduledState.DISABLED.equals(node.getScheduledState()) && node.isValid();
 
     /**
      * Predicate for filtering unschedulable Processors.
@@ -60,12 +60,12 @@ public interface ProcessGroup extends Authorizable, Positionable {
     /**
      * Predicate for filtering schedulable Ports
      */
-    Predicate<Port> SCHEDULABLE_PORTS = port -> port.getScheduledState() != ScheduledState.DISABLED;
+    Predicate<Port> SCHEDULABLE_PORTS = port -> !port.isRunning() && !ScheduledState.DISABLED.equals(port.getScheduledState()) && port.isValid();
 
     /**
      * Predicate for filtering schedulable Ports
      */
-    Predicate<Port> UNSCHEDULABLE_PORTS = port -> port.getScheduledState() == ScheduledState.RUNNING;
+    Predicate<Port> UNSCHEDULABLE_PORTS = port -> ScheduledState.RUNNING.equals(port.getScheduledState());
 
     /**
      * @return a reference to this ProcessGroup's parent. This will be
diff --git a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/partials/canvas/navigation.jsp b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/partials/canvas/navigation.jsp
index 7babfa0ec8..b09382fb94 100644
--- a/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/partials/canvas/navigation.jsp
+++ b/nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-ui/src/main/webapp/WEB-INF/partials/canvas/navigation.jsp
@@ -120,13 +120,13 @@
                     <div class="button-spacer-large">&nbsp;</div>
                     <div id="operate-start" class="action-button" title="Start">
                         <button ng-click="appCtrl.nf.Actions['start'](appCtrl.nf.CanvasUtils.getSelection());"
-                                ng-disabled="!appCtrl.nf.CanvasUtils.areRunnable(appCtrl.nf.CanvasUtils.getSelection());">
+                                ng-disabled="!appCtrl.nf.CanvasUtils.getSelection().empty() && !appCtrl.nf.CanvasUtils.canModify(appCtrl.nf.CanvasUtils.getSelection());">
                             <div class="graph-control-action-icon fa fa-play"></div></button>
                     </div>
                     <div class="button-spacer-small">&nbsp;</div>
                     <div id="operate-stop" class="action-button" title="Stop">
                         <button ng-click="appCtrl.nf.Actions['stop'](appCtrl.nf.CanvasUtils.getSelection());"
-                                ng-disabled="!appCtrl.nf.CanvasUtils.areStoppable(appCtrl.nf.CanvasUtils.getSelection());">
+                                ng-disabled="!appCtrl.nf.CanvasUtils.getSelection().empty() && !appCtrl.nf.CanvasUtils.canModify(appCtrl.nf.CanvasUtils.getSelection());">
                             <div class="graph-control-action-icon fa fa-stop"></div></button>
                     </div>
                     <div class="button-spacer-large">&nbsp;</div>