Sites not fully loaded in QML WebView on Android

Some sites not fully loaded in QML WebView on Android. As example [m.banggood.com. As far as I understand this related to this bug https://bugreports.qt.io/browse/QTBUG-76436. It marked fixed, but look like is it not.

Error produced on loading site:
 {{I chromium: [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot read properties of null (reading 'length')", source: https://psr.staticbg.com/rum/monitor.min.js?v=0508 (1)
I chromium: [INFO:CONSOLE(1)] "Uncaught TypeError: Cannot read properties of null (reading 'getItem')", source: https://ms.staticbg.com/default/web/dist/js/app.7b8d6ad7.js (}}

Reproduced on Qt 5.15.2 and 6.2.

Easyest way to reproduce - minibrowser Qt example.