diff --git a/DockDoor/Utilities/WindowManipulationObservers.swift b/DockDoor/Utilities/WindowManipulationObservers.swift
index fd4136d3..3bd45d3e 100644
--- a/DockDoor/Utilities/WindowManipulationObservers.swift
+++ b/DockDoor/Utilities/WindowManipulationObservers.swift
@@ -40,7 +40,7 @@ class WindowManipulationObservers {
 
         // Set up observers for already running applications
         for app in NSWorkspace.shared.runningApplications {
-            if app.activationPolicy == .regular {
+            if app.activationPolicy == .regular, app.processIdentifier != ProcessInfo.processInfo.processIdentifier {
                 createObserverForApp(app)
             }
         }
@@ -133,6 +133,12 @@ func axObserverCallback(observer: AXObserver, element: AXUIElement, notification
                 WindowUtil.updateStatusOfWindowCache(pid: pid, isParentAppHidden: true)
             case kAXApplicationShownNotification:
                 WindowUtil.updateStatusOfWindowCache(pid: pid, isParentAppHidden: false)
+            case kAXWindowCreatedNotification:
+                DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
+                    if SharedPreviewWindowCoordinator.shared.isVisible {
+                        SharedPreviewWindowCoordinator.shared.hideWindow()
+                    }
+                }
             default:
                 break
             }
diff --git a/DockDoor/Utilities/WindowUtil.swift b/DockDoor/Utilities/WindowUtil.swift
index fd38076c..c4feb58c 100644
--- a/DockDoor/Utilities/WindowUtil.swift
+++ b/DockDoor/Utilities/WindowUtil.swift
@@ -422,8 +422,7 @@ enum WindowUtil {
         } else {
             windowInfo.app.terminate()
         }
-
-        removeWindowFromDesktopSpaceCache(with: windowInfo.app.processIdentifier, removeAll: true)
+        purgeAppCache(with: windowInfo.app.processIdentifier)
     }
 
     // MARK: - Active Window Handling
@@ -453,11 +452,13 @@ enum WindowUtil {
         // Wait for all tasks to complete
         _ = try await group.waitForAll()
 
-        let windows = desktopSpaceWindowCacheManager.readCache(pid: app.processIdentifier)
-
-        guard !Defaults[.ignoreAppsWithSingleWindow] || windows.count > 1 else { return [] }
+        if let purifiedWindows = await WindowUtil.purifyAppCache(with: app.processIdentifier, removeAll: false) {
+            let windows = purifiedWindows.sorted(by: { $0.date > $1.date })
+            guard !Defaults[.ignoreAppsWithSingleWindow] || windows.count > 1 else { return [] }
+            return windows
+        }
 
-        return windows.sorted(by: { $0.date > $1.date })
+        return []
     }
 
     static func updateAllWindowsInCurrentSpace() async {
@@ -553,22 +554,28 @@ enum WindowUtil {
         desktopSpaceWindowCacheManager.removeFromCache(pid: pid, windowId: windowId)
     }
 
-    static func removeWindowFromDesktopSpaceCache(with pid: pid_t, removeAll: Bool) {
+    static func purifyAppCache(with pid: pid_t, removeAll: Bool) async -> Set<WindowInfo>? {
         if removeAll {
             desktopSpaceWindowCacheManager.writeCache(pid: pid, windowSet: [])
+            return nil
         } else {
-            Task {
-                let existingWindowsSet = desktopSpaceWindowCacheManager.readCache(pid: pid)
-                if existingWindowsSet.isEmpty {
-                    return
-                }
-                for window in existingWindowsSet {
-                    if !isValidElement(window.axElement) {
-                        desktopSpaceWindowCacheManager.removeFromCache(pid: pid, windowId: window.id)
-                        return
-                    }
+            let existingWindowsSet = desktopSpaceWindowCacheManager.readCache(pid: pid)
+            if existingWindowsSet.isEmpty {
+                return nil
+            }
+
+            var purifiedSet = existingWindowsSet
+            for window in existingWindowsSet {
+                if !isValidElement(window.axElement) {
+                    purifiedSet.remove(window)
+                    desktopSpaceWindowCacheManager.removeFromCache(pid: pid, windowId: window.id)
                 }
             }
+            return purifiedSet
         }
     }
+
+    static func purgeAppCache(with pid: pid_t) {
+        desktopSpaceWindowCacheManager.writeCache(pid: pid, windowSet: [])
+    }
 }