Failure when booting Ububtu 20.04 in Secure Boot

[AzJazz]

I am running Ventoy 1.0.53.

I just got my Ventoy USB drive working with Secure Boot. It was painful to get the MOK keys registered, but I finally figured out a work-around (Not Ventoy's issue, I know).

Now that I have my Ventoy USB working with Secure Boot, I started trying out all my ISO images to see how they ran.

I ran into a problem with my Ubuntu 20.04 ISO with a persistent image enabled.

When booting Ubuntu 20.04, I saw the following MOKManager failure:

Verification failed: (0x1A) Security Violation

Is this a known issue with Ubuntu and Secure Boot?

Thanks,

AzJazz