diff --git a/qutebrowser/browser/webengine/webview.py b/qutebrowser/browser/webengine/webview.py
index 2b197323b..be507c8b6 100644
--- a/qutebrowser/browser/webengine/webview.py
+++ b/qutebrowser/browser/webengine/webview.py
@@ -66,20 +66,26 @@ class WebEngineView(QWebEngineView):
         However, it sometimes isn't, so we use this as a WORKAROUND for
         https://bugreports.qt.io/browse/QTBUG-68727
 
-        This got introduced in Qt 5.11.0 and fixed in 5.12.0.
+        The above bug got introduced in Qt 5.11.0 and fixed in 5.12.0.
         """
-        if 'lost-focusproxy' not in objects.debug_flags:
-            proxy = self.focusProxy()
-            if proxy is not None:
-                return proxy
+        proxy = self.focusProxy()
+
+        if 'lost-focusproxy' in objects.debug_flags:
+            proxy = None
+
+        if (proxy is not None or
+                not qtutils.version_check('5.11', compiled=False) or
+                qtutils.version_check('5.12', compiled=False)):
+            return proxy
 
         # We don't want e.g. a QMenu.
         rwhv_class = 'QtWebEngineCore::RenderWidgetHostViewQtDelegateWidget'
         children = [c for c in self.findChildren(QWidget)
                     if c.isVisible() and c.inherits(rwhv_class)]
 
-        log.webview.debug("Found possibly lost focusProxy: {}"
-                          .format(children))
+        if children:
+            log.webview.debug("Found possibly lost focusProxy: {}"
+                            .format(children))
 
         return children[-1] if children else None