Virtual Shadow Maps not working on high resolution projector machine

We’re having issues with VSM not working for our packaged project on a specific machine.
On my own machine and another one that we have tried, VSM works fine with sharp shadows.
But on the error machine the shadows are all blurry. This machine is running NVIDIA Mosaic over two projectors. I have the specs written further down.
I can replicate the look on my own machine with r.Shadow.Virtual.Enable 0, which furthers my suspicion that something is wrong with VSM.
However, on the the faulty machine r.Shadow.Virtual.Enable still shows 1, so it has not been disabled in that way.

VSM working:

VSM not working:

Specs:
NVIDIA RTX A5000
NVIDIA Mosaic over 2 projectors
Projector res 3200x2400
Final resolution 3200x4800

As you can see the resolution is much higher then a regular screen. Could their be a limit to VSM based on the high screen resolution?
Is there any good console commands to debug this?

Regards, Gustav.