Another important aspect of this might be the browser you are using which sounds like Edge. I develop and test in Chrome so I'll see about testing in Edge (Usually doesn't work as well as Chrome).
I use Edge. I used Chrome until a couple of years ago when it stopped working so well. This could be to do with Google being blocked in China.
Besides, I download the game and play it on my PC directly. Would my choice of browser affect the gameplay at all?
I checked and your browser shouldn't be relevant in this case.