Vulkan + Reshade = strange flickering textures

Actually some people experienced such flickering textures problem even when they aren't using ReShade. So I not entirely what is causing such problem.

Example : https://youtu.be/vYfDUVY48SY

Spec: i5 2500k, RX580 8GB, latest AMD Driver Version
"21.20.01.14-210617a1-368925C-RadeonSoftware", W10 1903 Build 18362.657

I had been using ReShade for eternity and never seen such problem with PoE before. Also works fine in previous Ultimatum league. But recently came back to play again with a brand new fresh dedicated client download, and I got such weird problem trying to use ReShade.

Here's another thread with someone else having this bug despite NOT using ReShade:

https://www.reddit.com/r/pathofexile/comments/oxf4pi/once_again_asking_for_help_anyone_figured_out_how/

He claims that turning off engine multithreading 'fixed' the problem but obviously that is one option we shouldn't turn off... it causes all sort of lag.