W1603679198578 , via OnePlus 8T , Nov 24, 2020 : During the calls loud speaker is automatically ON ,I am not able to off the speaker also. Even I have rebooted the device still same problem. Could you please do something..
Tokolozi , Nov 24, 2020 : Report bug under feedback, here it's a users forum. https://forums.oneplus.com/feedback/
Xpress0 , via OnePlus 8T , Nov 26, 2020 : Which firmware version are you running? It has been working fine for me.