Resolution patch glitching

[ViktorWalter]

Bloodborne Resolution patches over certain size - in my case when using 3440x1440 - cause major visual glitches. This does not seem to happen in Hunter's Dream, but in Yarnham distant objects and the sky rapidly flicker between random textures. This is also accompanied by various glowy flashes. I'm attaching a screenshot, but as a static image it does not do it justice.
This has been going on across all builds I have tried for the past 2-3 months, without any change. These include older mainline builds as well as experimental fork builds released two days ago.

I have also seen this effect in videos of other users, for example this one , where the uploader directly addresses this issue.
Maybe the expanded frame buffer somehow starts overlapping with texture address space?

My specs (as this is probably relevant) are as follows:
CPU: Intel Core i7-8700
GPU: AMD 6800XT
RAM: 64GB