MacBook Pro 16-inch graphic card switching causes screen freeze issue

My Macbook Pro 16-inch freezes occasionally when it switches between integrated graphic card and discrete graphic card. Sometimes it just freezes for 1-2 seconds, but sometimes it may freeze up to 1 minute and I have to close the lib and re-open to regain control of the machine.

This issue never happened in my 2016 MBP.

Tools that I used to reproduce this issue:

   0. turn on Automatic graphics switching in Energy saver in System Preferences

1. launch gfxCardStatus https://gfx.io/ to send a notification when the actual graphic card switch is triggered
2. open your browser and go to https://www.antutu.com/html5/ start a benchmark to trigger the graphic card switch
3. create a sidecar chrome tab and run the timer on google. You can notice that at 1:30, the timer changes from 1m23s26 to 1m26s61 suddenly and the notification of GPU changed pops up on the top right without any animation. This is where the actual freeze is happening

I recorded a video to showcase this:  https://www.youtube.com/watch?v=oHkuT5sUUS8

Is Apple aware of this issue and will there be a future fix for this?