Big Sur Beta 2 and 3 Bluetooth issues

Last week when I was working I needed to unpair my magic mouse and pair it with my old iMac for few minutes. But later on Bluetooth module on my Macbook Pro 16" (2019) seems to be broken.

I tried resetting NVRAM/PVRAM, SMC and deleting plist com.apple.bluetooth plists on Preferences and ByHosts folder, rebooted in Diagnostic mode and tried everything I read on forums but still nothing for BT.

I started using a Bluetooth Dongle for it and it’s working.
When I reboot my macbook in Windows (Bootcamp) built in bluetooth module seems to be broken there too.

Tried turning wifi and my modem off too to avoid any interference. But still nothing.

On my console I’m getting

Sandbox: contextstored(100) deny(1) mach-lookup com.apple.server.bluetooth
Sandbox: ContextStoreAgen(419) deny(1) mach-lookup com.apple.server.bluetooth

And here’s my bluetooth details:

Apple Bluetooth Software Version:   8.0.0d41
 Hardware, Features, and Settings:
 Name:  jmbp
 Address:   F8-FF-C2-0F-3B-C9
 Bluetooth Low Energy Supported:    Yes
 Handoff Supported: Yes
 Instant Hot Spot Supported:    Yes
 Manufacturer:  Broadcom
 Transport: UART
 Chipset:   4364B3
 Firmware Version:  v63 c4183
 Bluetooth Power:   On
 Discoverable:  On
 Connectable:   Yes
 Auto Seek Pointing:    On
 Remote wake:   Off
 Vendor ID: 0x05AC
 Product ID:    0x0096
 Bluetooth Core Spec:   5.0 (0x9)
 HCI Revision:  0x1057
 LMP Version:   5.0 (0x9)
 LMP Subversion:    0x203F
 Device Type (Major):   Computer
 Device Type (Complete):    Mac Portable
 Composite Class Of Device: 0x38010C
 Device Class (Major):  0x01
 Device Class (Minor):  0x03
 Service Class: 0x1C0
 Auto Seek Keyboard:    On

All I can figure out is these. And I hope I can get some advices.
P.S Continuity seems to be working sometimes.