I have the same problem with the Marvell Bluetooth adapter driver on my Surface Pro 6.
I submitted the problem on the Feedback Hub.
Bluetooth Issues Since Surface Updates - 5 August 2021
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Anonymous
The Bluetooth on my Surface Pro (5th Gen) has not been working properly since the Surface Firmware Updates this morning. I have to restart to get it to work and then it only works properly for about 5 minutes. I have tried rolling back and reinstalling the Marvell driver. Also the Bluetooth troubleshooter doesn’t fix it. Running that troubleshooter causes Bluetooth to completely stop working. Will you please fix this urgently as it is a major issue for me?
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Surface | Surface Pro | Network
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198 answers
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Anonymous
2021-08-25T02:25:07+00:00 -
Anonymous
2021-08-24T12:05:26+00:00 Same problem here. VERY FRUSTRATING. Trying to get work done and wind up spending hours uninstalling my AVASTAR and rebooting, jumping between my keyboard and mouse and then the stupid touchpad. How many times do we all need to uninstall the driver, reboot and then wait about 10 minutes until it shuts off? I am up to about 50x. Let me try 51, maybe it will work this time. Great advice. 5th Gen Model 1796i5. Sometimes the keyboard endlessly types n's and 2's. Not sure if that means anything.
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Anonymous
2021-08-23T19:11:45+00:00 I spoke too soon. After several days of normality, BT is back to working for a half-hour and then turning off, requiring a reboot.
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Anonymous
2021-08-23T15:02:27+00:00 Could be...but I purchased a new mouse and that was not working either. :)
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Anonymous
2021-08-23T14:43:57+00:00 Or your BT mouse! ;)