2026 Textura updates are completely broken for me

[Oleaf]

Hi!
So I've been working on 2025.11 version since it was first released and payed today to have further one year update.
I am constantly having issue with windows layouts resetting to default, so I thought update will fix it. And this partticular issue, well, was fixed. 
On the other hand devs changed something critical about viewport or smth, that is not allowing me to work comfortably with Alpha cutout anymore. 

My main go-to setting is showing lowpoly model.(6 on a keyboard) 

See, it enables backface culling and getting rid of weird rendering way where borders of alpha texture showing all geometry below through them too.

That being said - in 2026 releases (and I tried few of them) hotkey 6 is not working. Moreover - changing options in View menu does nothing (Yes im aware of linear texture filtering and backface culling option there) - wireframe on mesh is not turning yellow, as it was before on 2025 release.
This leading me to another thing - when I am uploading my mesh - it has white aliased borders, with no texture applied at all. I dont know what the issue here with Viewport, but changing its settings does nothing too - it just broke. Below is screenshot of model, with Layer 0 disabled, no textures applied in Flat shading mode. Thode white boders are being on top of everything is just annoying.. 

Same mesh on my 2025.11 Textura relese have no such problem, Low-Poly option in Viewport working correctly.
I dont know what changed, but feels like I will stick to my 2025.11 release for another year, cause updating on newer one is just not working for me and I have spent half of day already trying to find whats wrong.
It is sad, that paying for update is kinda useless this time, but I hope this post will highlight one of a problems for people who works on pipeline like mine 

[Oleaf]

Oh, by the way
In few newer versions of 3DCoat textura same issue I described here also present, I tried only Stable releases