PDFs always display as two-up in full-screen horizontal mode

[aaaaaaaaaaaaaaaa]

[BLUEFROG]

• What device is this?
• What are your Settings > Documents > PDF Settings?

[aaaaaaaaaaaaaaaa]

iPhone 7 Plus
See settings below. I also tried switching from Automatic to Single, but the problem persisted.

[BLUEFROG]

This is what I’m seeing on an iPhone 12…