Glass doesn't blend into other glass like in 1.13.2

In 1.13.2, glass blended with other glass, causing it tonot have borders around it when next to glass. But in 1.14, it has a border again and looks weird. I don't know but why has it changed? Is it a bug or a changed feature? Let's hope it's a bug, as it's weird to change it from blending glass to weird border glass again.