I need someone to make a meme I can repost at moments like these.
“It’s not a bug, it’s a feature” 
Actually, I do think it’s “unfortunate” that the behaviour is not the same at all resolutions, but on the other hand that’s scaling for you. The tradeoff would be to scale a little bit more, which would compromise how many pixels you have for your stone image (and ensure terraria doesn’t work) or scale a bit less and end up with stones touching each other in an ugly way, I think.