Weird issue with display resolution

So I have been playing for YEARS, and always at 3840x2160 full screen. No issues this morning. Let Windows install the latest round of updates, then when I launch FFXIV I get to the title screen (at 3840x2160) and I can no longer interact with it. The mouse moves around but nothing is 'clickable'.
After some messing around I found this issue only exists in that specific resolution, if I back down to 1920x1080 everything works (of course all my UI settings are completely messed up as a result of scaling).
I tried installing the latest NVIDIA drivers just in case, but I can't think of anything I can do to fix this. I really don't want to have to drop down to 1920x1080 because it looks terrible.
Anyone else ever experience this? Any ideas on a fix?

** Edit **
I was able to fix the issue by disabling and then re-enabling DSR in the Nvidia control panel. My display is not native 3840x2160 so it relies on DSR to actually utilize that resolution. Not sure how that got messed up but fingers crossed I'm good now. Keeping this post in case this random thing happens to someone else!

If you're playing full screen, try borderless windowed

Would be ideal but it won't work, since my native resolution isn't 3840x2160 if I do borderless window the game doesn't fit on the screen (it's a 3840x2160 window but the Windows resolution is 1920x1080). I really should just shell out for a better monitor :)

NVIDIA lets you make custom desktop resolutions that your monitor doesn't support, and they sometimes work. I upped a 1080p monitor at work to 2160p so the mouse would move between multiple monitors more naturally

It's in NVIDIA Control Panel > Display > Change Resolution > Customize

Looks like they've updated it since I used it to autofill the extra junk. If you double the h/v resolution, then double the scale in display settings, everything should look the same

Greetings Alitheros,

We are happy to hear that that you've been able to resolve the issue you were experiencing.

This thread will be moved to the 'Closed Concerns' sub forum as a result.