Using Texture Arrays not working on 1080 Series

Hello everyone,

I noticed that using something like this

RWTexture2DArray MyTexture;

MyTexture[int3(PixPos, 3)] = 22;

Will actually write the value in the slice 0 of the texture.
This happens on 1080 and 1080 Ti series, but works properly on 770 and TITAN.
I tried submitting the bug through this website, but the submission system does not work.

Do you have any suggestion?