The prev owner of your house prob fed it, we did that with a neighbours cat, gave it the odd treat once or twice, I did ask the owner if I could an she said it was fine, after a while we would come home an find the cat on our doorstep waiting on us lol, there would be times we would go out an the cat would run over as well, cats get into a routine as well, if the prev owner used to fed it at a certain time then it will always be over at that timeNo it looks fine! It’s just weird cos I’ve literally watched it just walk across neighbours gardens and come straight to ours. I don’t really know the neighbors that well tbh but I’ll try catch one of them!