diff --git a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/patch/PatchClipboardTracker.java b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/patch/PatchClipboardTracker.java
index eeac82f9942b..3781d080c952 100644
--- a/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/patch/PatchClipboardTracker.java
+++ b/platform/vcs-impl/src/com/intellij/openapi/vcs/changes/patch/PatchClipboardTracker.java
@@ -22,6 +22,7 @@ import com.intellij.openapi.components.ApplicationComponent;
 import com.intellij.openapi.diff.impl.patch.PatchReader;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.vcs.VcsApplicationSettings;
+import com.intellij.openapi.wm.IdeFrame;
 import com.intellij.util.messages.MessageBusConnection;
 import org.jetbrains.annotations.NotNull;
 
@@ -43,6 +44,19 @@ public class PatchClipboardTracker extends ApplicationComponent.Adapter {
   }
 
   private static class PatchClipboardListener extends ClipboardAnalyzeListener {
+    @Override
+    public void applicationActivated(IdeFrame ideFrame) {
+      // we can't get clipboard details especially content size, so we should avoid clipboard processing when it's possible;
+      if (!VcsApplicationSettings.getInstance().DETECT_PATCH_ON_THE_FLY) return;
+      super.applicationActivated(ideFrame);
+    }
+
+    @Override
+    public void applicationDeactivated(IdeFrame ideFrame) {
+      if (!VcsApplicationSettings.getInstance().DETECT_PATCH_ON_THE_FLY) return;
+      super.applicationDeactivated(ideFrame);
+    }
+
     @Override
     protected void handle(@NotNull Project project, @NotNull String value) {
       new ApplyPatchFromClipboardAction.MyApplyPatchFromClipboardDialog(project, value).show();
@@ -50,7 +64,6 @@ public class PatchClipboardTracker extends ApplicationComponent.Adapter {
 
     @Override
     public boolean canHandle(@NotNull String value) {
-      if (!VcsApplicationSettings.getInstance().DETECT_PATCH_ON_THE_FLY) return false;
       return PatchReader.isPatchContent(value);
     }
   }