AO issues in FFXIV with ultrawide monitor

Hi all,

Started playing FFXIV again after a long break and also having purchased a 5120x1440 monitor. I reinstalled Reshade to get some my presets back for GPosing and such, except I'm encountering a weird issue, specifically when using any kind of technique that uses AO and when in borderless windowed mode (which is pretty much a requirement with how often I'm tabbing in and out of the game for various reasons). 

Its a bit hard to see in a still image, but if you look at this screenshot you can see the AO for the pillar in front of my character off to the left of it - it looks like smudges in the clouds.

If I revert the window to a 16:9 aspect ratio, the issue goes away. If I go into fullscreen mode, the issue goes away. I've tried hunting for solutions and have come up empty handed. Anyone know of a fix for this?

Thanks.
https://imgur.com/TrcKSn7https://imgur.com/a/y4IdS2h