diff --git a/browser.py b/browser.py
index de5f3ea..10acbde 100755
--- a/browser.py
+++ b/browser.py
@@ -515,11 +515,15 @@ class KioskOverlay(QWidget):
 
     def _on_screen_resize(self, rect):
         global SCREEN_W, SCREEN_H
-        SCREEN_W, SCREEN_H = rect.width(), rect.height()
+        w, h = rect.width(), rect.height()
+        # Ignore bogus sizes from minimize / RDP disconnect events
+        if w < 400 or h < 200:
+            return
+        SCREEN_W, SCREEN_H = w, h
         self.setGeometry(0, 0, SCREEN_W, TOP_H)
         self.resize(SCREEN_W, TOP_H)
         # Resize Chrome after brief delay so X has settled
-        QTimer.singleShot(300, self._resize_chrome)
+        QTimer.singleShot(500, self._resize_chrome)
 
     def _resize_chrome(self):
         self.cdp.resize_window(0, TOP_H, SCREEN_W, SCREEN_H - TOP_H)