[OnePlus 3T ROMs, Kernels, Recoveries, & Other Deve] m0d hipp¥:
Fixed the ADB issue. Not sure why, but with this rom it wasn't getting the adb interface driver. Not sure if anyone else is running into this, but I'll explain how I fixed it.

1. First I went into Device manager and went into the unknown device proeprties

2. Click "Details" tab

3. From the drop down go to "Hardware IDs"

My hardware ID showed the following:

USB\VID_05C6&PID_9039&REV_0318&MI_01

USB\VID_05C6&PID_9039&MI_01

Next I went into the path of where my original OnePlus drivers were "C:\Program Files (x86)\OnePlus USB Drivers"

1. Right click "OnePlus_android_winusb.inf" and edit in a text editor. I editted it in Notepad++

2. I will highlight the following changes I made in that file

; Copyright (C) [2015] OnePlus Corporation
;
; Android WinUsb driver installation.
;
[Version]
Signature = "$Windows NT$"
Class = AndroidUsbDeviceClass
ClassGuid = {3F966BD9-FA04-4ec5-991C-D326973B5128}
Provider = %ProviderName%
DriverVer = 05/24/2012,6.0.0000.00000
CatalogFile.NTx86 = androidwinusb86.cat
CatalogFile.NTamd64 = androidwinusba64.cat

;
; This section seems to be required for WinUsb driver installation.
; If this section is removed the installer will report an error
; "Required section not found in INF file".
;
[ClassInstall32]
Addreg = AndroidWinUsbClassReg

[AndroidWinUsbClassReg]
HKR,,,0,%ClassName%
HKR,,Icon,,-1

[Manufacturer]
%ProviderName% = OnePlus, NTx86, NTamd64

[OnePlus.NTx86]
;14041
%SingleAdbInterface% = USB_Install, USB\VID_22D9&PID_2769
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2769&MI_00
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276F&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276C&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276D&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9031&MI_02
[B]%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9039&MI_01 ;added by james - supports OP3T 4.0.3 Lineageos[/B]
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2765&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2766&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2767&MI_00
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2772&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2774&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2775&MI_03
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9025&MI_01
;14049
%SingleBootLoaderInterface% = USB_Install, USB\VID_18D1&PID_D00D ;fastboot
%SingleBootLoaderInterface% = USB_Install, USB\VID_2A70&PID_D00D ;oem fastboot
%SingleBootLoaderInterface% = USB_Install, USB\VID_2A70&PID_D00D ;oem fastboot
%SingleAdbInterface% = USB_Install, USB\VID_2A70&PID_4EE7 ;adb
[B]%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9039&MI_01 ;added by james - supports OP3T 4.0.3 Lineageos[/B]
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9031&MI_02 ;default
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9025&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9039&MI_01 ;mtp,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_904E&MI_01 ;ptp,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9011&MI_02 ;mtp,mass_storage,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9024&MI_02 ;rndis,adb

[OnePlus.NTamd64]
;14041
%SingleAdbInterface% = USB_Install, USB\VID_22D9&PID_2769
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2769&MI_00
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276F&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276C&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_276D&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9031&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2765&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2766&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2767&MI_00
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2772&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2774&MI_02
%CompositeAdbInterface% = USB_Install, USB\VID_22D9&PID_2775&MI_03
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9025&MI_01
[B]%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9039&MI_01 ;added by james - supports OP3T 4.0.3 Lineageos[/B]
;14049
%SingleBootLoaderInterface% = USB_Install, USB\VID_18D1&PID_D00D ;fastboot
%SingleBootLoaderInterface% = USB_Install, USB\VID_2A70&PID_D00D ;oem fastboot
%SingleAdbInterface% = USB_Install, USB\VID_2A70&PID_4EE7 ;adb

%SingleAdbInterface% = USB_Install, USB\VID_18D1&PID_D002	;adb
%CompositeAdbInterface% = USB_Install, USB\VID_18D1&PID_D002&REV_0318 ;default

%SingleAdbInterface% = USB_Install, USB\VID_18D1&PID_4EE2	;adb
%CompositeAdbInterface% = USB_Install, USB\VID_18D1&PID_4EE2&REV_0318&MI_01 ;default

USB\VID_18D1&PID_4EE2&REV_0318&MI_01

[B]%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9039&MI_01 ;added by james - supports OP3T 4.0.3 Lineageos[/B]
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9031&MI_02 ;default
%CompositeAdbInterface% = USB_Install, USB\VID_05C6&PID_9025&MI_01
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9039&MI_01 ;mtp,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_904E&MI_01 ;ptp,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9011&MI_02 ;mtp,mass_storage,adb
%CompositeAdbInterface% = USB_Install, USB\VID_2A70&PID_9024&MI_02 ;rndis,adb

[USB_Install]
Include = winusb.inf
Needs = WINUSB.NT

[USB_Install.Services]
Include = winusb.inf
AddService = WinUSB,0x00000002,WinUSB_ServiceInstall

[WinUSB_ServiceInstall]
DisplayName = %WinUSB_SvcDesc%
ServiceType = 1
StartType = 3
ErrorControl = 1
ServiceBinary = %12%\WinUSB.sys

[USB_Install.Wdf]
KmdfService = WINUSB, WinUSB_Install

[WinUSB_Install]
KmdfLibraryVersion = 1.9

[USB_Install.HW]
AddReg = Dev_AddReg

[Dev_AddReg]
HKR,,DeviceInterfaceGUIDs,0x10000,"{F72FE0D4-CBCB-407d-8814-9ED673D0DD6B}"

[USB_Install.CoInstallers]
AddReg = CoInstallers_AddReg
CopyFiles = CoInstallers_CopyFiles

[CoInstallers_AddReg]
HKR,,CoInstallers32,0x00010000,"WdfCoInstaller01009.dll,WdfCoInstaller","WinUSBCoInstaller2.dll"

[CoInstallers_CopyFiles]
WinUSBCoInstaller2.dll
WdfCoInstaller01009.dll

[DestinationDirs]
CoInstallers_CopyFiles=11

[SourceDisksNames]
1 = %DISK_NAME%,,,\i386
2 = %DISK_NAME%,,,\amd64

[SourceDisksFiles.x86]
WinUSBCoInstaller2.dll = 1
WdfCoInstaller01009.dll = 1

[SourceDisksFiles.amd64]
WinUSBCoInstaller2.dll = 2
WdfCoInstaller01009.dll = 2

[Strings]
ProviderName = "OnePlus, Inc."
SingleAdbInterface = "OnePlus Android ADB Interface"
CompositeAdbInterface = "OnePlus Android Composite ADB Interface"
SingleBootLoaderInterface = "OnePlus Android Bootloader Interface"
WinUSB_SvcDesc = "Android USB Driver"
DISK_NAME = "Android WinUsb installation disk"
ClassName = "Android Phone"

After I made those changes (additions), I saved the file and then browsed to the path for it to find the driver.

I had a popup come up to install the questionable file (this happens because it's not signed by Microsoft), you can go ahead and accept the driver install

After this, I ran ADB devices to test it out and it worked fine. Picked up my device and I was able to authorize it on the phone.

I hope this helps you guys out. If you need me to upload it, just let me know.