The issue with the grid at 1025px is definitely fixable, but I’m not sure about these other issues.
I can’t replicate the back to top button issue on your site or on mine, at any zoom in or out range.
Artifacts like the border etc.. are caused by the browser itself, so I don’t think that’s going to be fixable until the browser itself improves the zooming functionality.
Luckily, these issues are quite minor to the average user, as very few people browse websites zooming in and out.
However, the grid issue is my main priority right now, as that is definitely a bug that needs to be fixed.
I appreciate your help on this 🙂