Phone crashes when using discord in the background

My phone completely crashed when i tried to use Discord voice chat on the background while playing games, my phone suddenly crashes and being unresponsive to any type of command/touch and can only be restarted by long pressing the power button. I don't know why this problem occurs, before the update which is like a few weeks ago it can run well and fine without any sort of problem. Now when i open discord and join a voice chat on the background and play games it just immediately crashes. This only happens when i joined a voice chat to talk with my friends, opening dual windows doesn't seem to be a problem at all. Please fix this problem. My device is Xiaomi Pocophone F1 running on Miui 12 and Android 10 and my Discord version is 80.9. Thank you.