Viewing DNG file created by Lightroom Denoise AI In XnView Classic

[bhudda]

Hi
I'm hoping someone can help me.
I've been using XnView Classic for many years and it does everything I need.
I have started using two different denoise programs on my RAW files (only one at any one time!):- DxO PureRaw and, lately, Lightroom Classic AI Denoise. Both of these programs create big (>60MB) DNG files.
I can view both DNG files in Windows Photos (Windows 11) but, in XnView Classic, I can view the DxO DNG in thumbnail and fullscreen but the Lightroom DNG shows in Classic a thumbnail of only the top left corner area of the DNG. The full screen is just the same.
Can anyone please suggest how I can make the Lightroom AI Denoise DNGs viewable in XnView Classic?
As you will have gathered, I'm not particularly technical so I'm stumped with this!
Thanks