APK Not Signed On Upload To Release Channel

I am getting an APK not signed message on build upload to a consumer release channel on Oculus Dashboard, however it was working, details below.

This is the output from apksigner

Verifies
Verified using v1 scheme (JAR signing): false
Verified using v2 scheme (APK Signature Scheme v2): true
Number of signers: 1

I have no problem with Unity 2019.4.19 using the Standard Utilities Plugin and the previous Oculus Integration (not sure what it was but not 23.1)

However, I am now using 2020.2.4, with XR Plugin Management 3.2.17, Oculus XR Plugin 1.7.0 and Oculus Integration 23.1

The application builds and works on the Quest, but whether I build via Unity, export to Android Studio and build there or even export and force Android Studio to sign the application using Generate Signed Bundle/APK, I get the same error.

I have tried a new Keystore, checked gradle files and a variety of other items.

The build settings are pretty much the same as in 2020 to 2019, so I am at a loss. 

Any ideas?