Who sees black bars in ListBoxes on Big Sur beta?

I am trying to find proof that apps made with Xojo are showing black ListBox headers.

If you have proof of this, please comment, with your hardware setup (i.e. which Mac model, which GPU).

IF YOU DO NOT SEE THE ISSUE, PLEASE DO NOT REPLY!

We know it doesn’t happen to everyone. We only need to know about those to see the issue. Thanks.